C_m--

Name: i

I

•=.IlUlililMIllilllliiIlillllllllHIllllIIIiliIlllIllIlll ----

DO NOT TURN THIS PAGE UNTIL DIRECTED TO DO SO . .

Chemistry 1315 • EXAM 1 Spring 2009

.4I_ame:_ Lablnstructor: "_

ID Number: _1. These tests are machine graded; therefore, be Sure to use a No. 1 or 2 pencil formarking the answer sheets.

Completely blacken the answer circle. If you change an answer, erase comple[ely the previous mark.

2. Write the letter code of your lab instructor (see table at bottom of this page) inthe first box of the sectionmarked "NAME". Then in the next box (do not skip a box), write your last name. Skip a space and then

• fill in your first name and middle initial. Example: If Joe B. Doe has Gopal Abbineni, Section 36 for a labinstructor, then his answer Sheet wouJd look like:

EXAMPLE: 1st Box T.A. code (see below)

If your whole name does not fit, put as much as will fit. Then blacken.the corresponding letters below each.

• space on the answer sheet, i " . " \ ,3. Fill in your ID number in the space provided, beginning with space "A". (There will be an extra box.)

'"Then blacken the circles corresponding to the numbers below CatchSl:iace_.

4. In the "special code" section, indicate !n column K the test formtyou have:L

Mark in Column K Test Color . Answer Sheet Color SwipeBIu_ ) 1 Blue '1

;2 , Gold " Black

I

3 " ' Pink Red

4. Tan Brown . :

Make sure that you mark your test color in column K, and that the colored swipe above your name on the.

answer sheet is the same as yore: test color.

5. - In the "Special Ccx:les" section, indicate your lecture instructor in column P. Please fill in the appropriatecircle. ' " "

_lnstr ".or___-.__.-__' Section " Time ._ " D_._2__,,,___-----_v- ......... --?-= ./_ o_ -_-_-._-_._.--._--_=--_----- Abraham 00'1 ' • 10:30-11:45 am .

Clifford 002 i 1:30-12:20pm MWF

Clifford 003 . . 8:30-9:20 am MWF

Thus if Joe Doe's lecturer is Abraham, Sec. 001 and his iest is GOLD, his "Special Codes" section would be:

SI'UCIAL CODES

:,MNo;

@@@®C '6)¢)QQO

", 0@®®@@

6. The time limit on this test is 90 MINUTES• •

7. READ THE'rEST CAREFULLY• ' ' '

8. " Do not turn this page until directed to do so.

• 9. Use this booklet for scratch paper•; You may not bring your own scratch paper to the test.10. Mark your answers in this booklet, as well as on the answer sheet, so that you can check your scorewith

the key after the test•

11. Each Unit Score will be calculated from the number of correct answers• There is no.penalty for guessing.12. Students will be held responsible for any corrections made during the test. •'

13. Students who arrive more than ten minutes late, or arrive after another student has left, will not beallowed to take the examination. '• "

Instructor Code _ Exam Room Instructor ,Code _ Exam Room

Abbineni,Gopal . A 36 .DH 206 .j McKee,Emily K lg, 33 DH21 I.Beal, Jennifer B 22 DH 200 Qiu,Penghe L 37 DH200Fontenelle,Lueas C 14,38 . NH 270 Quinalty,Leslie M ' 13 PHSC201 "GalaMarco, Amparo D 12,27 PHSC201 She, We!feng N. 17,28 NH270Guan,Rong E 29, 40 , DH 200 • Tang,Hui O 34 PHsc 201Hageman,Serena F 30, 35 DH 211 Wang,Xiaoru • P 25_26 NH270James,Robinson G 43, 44 DH '511 Xulu,Alex Q 31 DH:200

• V,irby, Katie H 24',45 DH 211 Zhang,Xiaohan. R 21,41 . DH 206Li, Dong 1 t6, 19 DH200 Zhou, Yongyao S 46, 47 DH200McClaifl,Mike J 42 PHSC201

¢

l,

Unit 1 - Basic Concept, Atoms, Molecules, & Ions --.

_/ 1 Whichofthet_ollowingmeasurementsis'the_.__ , . , . _

A. 1.20xl02in , @9.86fi - " " ,_I_)V,z_ _-'lg} ="? _'_'''

2, s 7.87 g/cm a What volume (in cm3) does'a 7.35,x 10-1 kg mass of • I r-_.

/1 07,Xi01 34x101 /578x 103 _f:_ "/_._,7x10 -2 B. 9.34x10:2 . ,,@. .

3. The densityof gold is 1.932 x l04 kg/m3. What is this d6nsity expiessed ih Itiii_n3? L ..i,_'1°°°9 _ 0 ' L,G:'I PO , _ a,,, _• _o1_2.0 _,_ ,, I°1 2, 000o/_,.__._v_, ._-_7._qZ._-al,l_,<_- -

(A.'} 6.980x I0 -l B. 1.082x 103 '. .CL:4..261x.i04 . '- _ - ' "

: _. I..4'56xI0 II ' -E..5.350xi014" '" " " ., ,_12,_.._-17_'.._

4. How many.significant figures shoulcl be reported for the following calculaiion? ....

_,._ to_.-rc-1 • ... - .4_0_.,___.(.ar'C,_.-,'841D'/ffx (35.78 + 27.51) • : "7.819' - ' - -

• _'_ '__._oz_" _ ,_,,<c 'i'. " _'_

A. 5 B. 4 C. 3 "'." "-(,,.._'2 '. E_ 1 ,ooo

_.w_chofthefo.owingq_'-_/¢_a -"" :%: " " =_-_ _ _ _0_ _i"Z., - " ._- - - ."T¢_"

1. J. J. Thompson determined the charge of an electron'.G Robei-t Millikan first calculated the mass of the electron.. " ;

One outcome of Ernest Rutherford's gdld foil alpha-scaitering experiment was that whilemost of the mass of an atomwas found in"the nucleus, the nucleus itself occupied a verysmall fraction of an atom's volume .....

• 4. James Chadwick discovefedthe existence of neutrons in the nucleus of the'at0m_:5. Robert Millikan determined the charge:to,mass ratio of the _lectron

A. 1,2, and3 (_).2,3'and4 __d:'¢3'•, _ E. 3,4arid5

6. "The boiling 15ointof nitrogen is 77.36 K. What is'this temperature in degrees Fahi'enheit? -

(_-32014 - B, -195.8 . C. '-126.6 D. -76.78 E. 662;9 ...

7. Which of the following statements are true? _"l q_ =0(__ L'I_. (___ . .. .__ • ,. • . . . ,.

-_/2. Bromine is a halogen. . "- 0(,_, _-i°lt-SJ .'_ 61IIII iVll,O,

.. -..... . . . . . :•if5. Some transition metals can form more than one possible ion

1, 2, and 3 . _ 2, 3, anct 5 "._/2and 5 . .-.. 1,3 and5 - -_,.1, 2, 3, 4, and 5 are true statements. "-

\. er-2.9 ._7.t_,,, ',, •UO?"_

i- . - Page1,v_ q,_2A ._ _' "Z._4________c_' - -,. .be,a \ iv_

• o .

\I

8. Which of tile foll0wing represents an ion with 82 protons, 124 neutrons, an(] 80 electrons?

"__b (¢_t" B._Pb-." C.X_ n,1124Dh, f_" _206pb,_*"" 82"". ,82 .

/zo_ . ,.. . ,/_;,_' " eo . oo " "9. Which of the following are entirely correct? " . .. i

• (1_. K2SO4: . potassium sulfate: 2. PIJCI2 lead (I) chloride - - ,

- 4. LiCO 3 lithium carbonate - .: .-5 Na3PO 4 sodium phosphate .- t

• ®A. 1, 2, and 3 1 and 5 I_C.,2, 3._tnd.4 D. 3, 4, and 5 " E. ,1',3 and 5 :. 'l, 5z

C 10. Which of the following is the correct nam6 for SeO3?

A. selenium oxide monose!enium tri.0xide., . C. selenium trioxide

D. selenium (II) oxide ___ selenium CllI)oxide -

Unit 2 - Stoichiometry ,.

G. 11. Roundup, an herbicide manufactured by Monsanto, has the"formula:C3H8NO5P.. How.many moles are in a 500. g sb.mple of Roundup? _(¢.0_"4" _,OLoz_-_ 14.0 I 4" 8)0 _ "_0._1"/

' o1 -

® 0.338 ,. 1.75 S"".9o- D, 84.5 E. none of these . _. .

• ®12. A 5.95 g sample of AgN03 is reacted with'excess BaCl2.according to the equatign _D2 AgNO3(aq) + BaCl2(aq) ---" 2AgCi(s) + Ba(NO3)2(aq) : t_¢q'0"}_z_ '"

4.00 -to give 4.00 g of AgCl. What is the percent yieldofAgCl? ,% rio

.A. 21.4% B. 39.8% 67.2% D.. 79.7% • E. 93.5%

13. What is the coefficient for water when the following equation is balanced?

7- _,s(OH)3_+ __H2SO4_9--- mA,2(SO4)31__-12)H2Og_

_,_ " - C. 4 6 E? 12

14. What is the molarity of the solution that contains 17.1 g of barium hydroxide, Ba(OH)2,

dissolved in enough water to make 0.300 L of solution? .. : .

G i , . .

0.333"M B. 0.100 M " C. 5.13 M " D: 57.0 M E. 1.00 M -

'"Vag'e2'_el " _ i'_- .',

15. You take,an aspirin tab!et (a compound consisiting solely of carbon, •h_,drogen, and oxygen) -. C.O - • . -:

b with a mass of 1.00 g, burn it in air, and collect 2.20 g of_ and 0.400 g _ _4-'eOThemolar masg of aspirin i.s.between 170 and 190g/tool. The molecular fo(m of aspirin is: ... .- i .

• " "__" ' '"_ _""Or,_'''i :_0

q _a_O_a"Io.o_,t 7AiOZ.* _ _'"?"16. Adipic acid contains 49.32% C, 43.84°_ O, and 6.85% H by mass. What is the empirical .'Z.5" _ 7. ..

formula?' .,_Z" ._ _ ,,,_ i"_,"o[ _ 0_1

• .•ow_s'O×.!__..__,._.Ot_'110_2L _• . " _,o0'# i"1"' "_-_..X.._'_. '

(_C3H502 B. C3H304" C. C2HO3_ D. C2H5.O4 E. C3'_IO3 -0 vq'_ 2/_

17. What is ihe mass of_one atom of copper in grins? . _,_7_0 2-_1 6

..

18. How many grams of Ca(NO3) 2 c_ be produced by reacting excess HNO3 wiih 7.40 g ofCa(OH)2? " .

A. 10.2g B. 16.4g C. 32.8g 8.22g " E. 7.40g ....

19. A 15 g samp!e of lithium is reacted with i5 g of fluorine to form lithium fluoride:

"2Li + F2 ---, 2LiF .:1£_ [11, .._.__._:

After the reaction is complete what viii be present? " I_ ";

:. I_I _..._. 2.16 moles lithium fluoride only.

'_ 0.789 moles lithium fluoride only i "C. 2.16 moles lithium fluoride and 0.395 moles_fluorineD. 0.789 moles lithium fluoride and 1.37 moles lithium

_none of these..

20. The atomic mass of rhenium is-186.2 Given that 37.1Vo of natural rhenium is rhenium-185, .what is the other stable isotope?

¢

A. e B. 75_e _ .75Re . 75Re

i Laz l .

\N \ ,glPage 3, vl

,7. , t

_r_.

PHYSICAL AND CHEMICAL CONSTANTS "

Atomic mass unit -1 amu =,1.66054 x 10 .27 kg

• "- 6_02214 x 10z3amu = 1 g

Avogadro's number N = 6.022 x 10_/mol

Bohzmann's constant k = 1.38 x 10z_ J/K

Electron rest mass . m° = 5.486 x 10"_ainu

= 9.109 x 10_'g

Faraday's constant F = N e = 9.6485 x 1-04C/mol

Gas constant R = N k = 8.3145 J/(K.mol)

= 0.082058 L.atm/(K.mol) "'

Heat (caloiies and Joules) 1 cal = 4.184_J

Neutron rest mass m. = 1.00866 amu 7

= 1"67495 x 10_ g

pi _x= 3.1415926536

Planck's constant - - h = 6.6260755 x 10 -34 J's] •

Proton rest mass mp = 1.00728 amu

= 1.67262 x 10_ g-.

"S_ed of light (vacuum) c = 3.01J'x 108figs ,

Volume of a cylinder . N=hnr} (h = height, r = radius

ENGLISH/METRIC CONVERSIONS

.1 lb..= 16oz:=453.6 g "_ 1 mile = 5280 ft,1 in. = 2.54 cm 1 kilometer = 6.214 x 10" mile

_; 1 gallon = 3.785 liter ' "

RYDBERG EQUATION

1= 1 1 ) = [ 1 1- AE - chRI_ -_. ni 2 n2 2., . ,nf ni 2 ]

R = 1.097x _)7_:t.'_.- - ...... _-S"-.'-chR_'2.18 x.lff_a;J . __ - - -_- .... -. .\

va-_v-_kt"

Periodic Table of the Elements -A I

_ " . . _ .2, 18_I -- 2

1.008 2 13 14 15 16 17 4.003 4 5 • 6 . 7 8 9 10

2 Li Be , B C N O F. Ne6.94 9.01 10.81 12.01 14.01 16.00 19.00 20,18

II 12 .13 , 14 15 16 17 , 18

3 Na Mg . AI Si P S CI Ar22.99 24.30 3 4 5 6 7 8 9 l0 : 11 12 26,98 28,09 _0,97 32.06 35.45 39.95

19 20 21 I 22 23 24 : 25 J _6 I 27 28 29 30 31 32 33 34 35 36 . :

4 K Ca Se I Ti V Cr Mnl,vel Co Ni Cu Zn Ga Ge As Se Br Kr39.10 40.08 L96147.88 50.94 52.00 54.94'55.85158,93 58.69 63.55 65.38 69.72 72.59 74,92 78,96 79.90 83.80"37 38 39 I 40 41 42. 43 -'_ ,'45 46 47 48 . 49 50 - 51 52 53 54 ..

5 Rb" Sr" Y I Zr Nb Mo "Tc Ru IRh Pd Ag. Cd In Sn S b Te I- Xe.85.47 87.62 .91191.22 92.91 95.94 "(981 101.11102,9 106.4 107.9 112.4 114.8 118.7 12118 127.6 126.9 131.3 . • . . r

55 56 71 I 72 73 74 75 " I 77 78 79 80 81 82 83 84 85 86

6 Cs Ba Lu IHf Ta W Re Os I Ir Pt Au Hg TI Pb Bi Po At Rn132.9,37,50,1785, 09,838, 62,902 92-.2195.1 197.0 200.6 204.4 207.2 209.0 (209) [210) (222)• 87 88 103 [ 104 105 106 107 /081 109 10 I11. 112 114 116

7 Fr Ra Lr I Rf Db Sg" Bh Hs 'Mt Uun Uuu Uub ' Uuq Uuh(223) 226£ 60)1(261) (262) (263) 1262) (265) {266) (2711 (272) (277) (285) (289)

Lanthanides . =57 58 59 60 61 62 63 64 65 66 67 68 69 70

La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb _138.9 140.1 40.9 144.2 (145) 150.4 152,0 157.2 158.9 162.5 164.9 167,3 168.9 173.0

• 89 90 91 92 93 . 94 95 96 97 98 99 100 101 •102

_ • Actinides Ae Th Pa U NP pu Am. Cm Bk Cf Es Fm Md No227.C232.0 231.0 238.0 237.0 244)(243 (247) (247) (251) (252) (257) (258) (259)

(Mass numbers given in parentheses represent the mass number of the most stable isotope.) -

" DO NOT TURN THiS PAGE uNTIL DIRECTED TO DO SO

S, : 'Ch'emistry 1315 EXAM 2 Spring 2009

Name: _, Instructor: "T"O _g'_: ".,

ID Number:1. These tests are maclfin or 2 pencil for marking the answer sheets.• e graded; therefore, be sure to use a No. 1

Completely blacken the answer circle. If you change an answer, erase completely the previous mark•

2. Write the letter code of your lab instructor (see table at botiom of this page) in the first boxof the section

marked "NAME". Then in the next box (do nbt, skip a box), write your last name. Skip a space and thenfill in your first name and middle initial• Example: If Joe B. Doe has Gopal Abbineni, Section 36 for a labinstructor, then his answer sheet would I_ok like:

EXAMPLE: 1st Box T.A. code (see below)

If your whole name does not fit, put as much as will fit. Then blacken the corresponding letters below eachspace on the answer sheet.

3. Fill in your ID number in the space provided, beginning with space "A". (There will be an extra box,)

Then blacken the circles corresponding to the numbers below each space.•

4. In the "special code" section, indicate in column K the test form you have:

Mark in Column K Test Color " Answer Sheet Color SwipeI Blue Blue

2 • Gold -,,--Black

3 Pink Red

• ,- 4 Tan Brown

Make sure that you mark your test color in column K and tha! the colored swipe above your name on theanswer sheet is the same as your test color.

5. In the "Special Codes" section, indicate your lecture instructor in column P. Please fill in the appropriatecircle.

Instructor Section Time D_Abraham 001 10:30-11:45 am TR

Clifford 002 I1:30-12:20 pm MWFClifford 003 8:30=9:20 am " MWF

Thus if Joe Doe's lecturer is Abraham, Sec. 001 and his test is GOLD, his "Special Codes" section would be:

SpECIAl. CODF_S

;LMNo;

(D©@©

6. The time limit on this test is 150 MINUTES.

7. READ THE TEST CAREFULLY.

8. Do not turn this page until directed to do so.

9. Use this booklet for scratch paper. You may not bring your own scratch paper to the test•"10. Mark your answers in this booklet, as well as on the answer sheet, so that you can Check your score with

the key after the test.

11. Each Unit Score will be calculated from the number of correct answers. There is no penalty for guessing,12. Students will be held responsible for any corrections made dmq'ng the test.

13. Students who arrive more than ten minutes late, or arrive after another student has left, will not beallowed to take the examination.

Instructor Code _ Exam Room Instructor Code _ Exam RoomAbbineni,Gopal A . 36 DH 206 McKee,Emily K 18,33 DH211Beal, Jennifer B 22 DH 218 Qiu,Penghe L 37 ' DH200Fontenelle,Lucas C 14,38 NH 270 . Quinalty,Leslie• M 13 PHSC201Gala Marco,Amparo D 12,27 , PHSC201 She, Weifeng . " N 17,28 NH270

a Guan, Rong . E 29,40 DH 200 ,, Tang, Hui O 34 PHSC201[lageman, Serena . F 30, 35 DH 21I Wang,Xiaoru P " 25, 26 NH270James,Robinson G 43, 44 . DH 21I' Xulu,Alex Q 31 DH218

k Kirby.Katie I-I 24, 45 DH 211 Zhang,Xiaohan R 21,41 DH206 ..

Li, Dong 1 16, 19 DH 200 • Zhou,Yongyao S 46, 47 DI-I200McClain,Mike J 42 PHSC201

&l• " . : ; _J

Unit 1 - Basic Concepts, Atoms, Molecules, & Ions " --

_) _ /Which_fthef_wing_isti_ags_fe_eriae_tsc_ntai_saha_gen_ana_ka_e.ea/1hmeta_anda _: ',/ trahsition metal in any order? - ' ' _ ' .- " " .._

@ /. 2

: Ar, Co, K Na, Fe, 1 "_ Pb, Br. Be. /'_ Mn. el; Mg .E. Al, Cr_.O ." .-

Which of the following is correct?.

A. PBr5 phosphorus pentabromide _ N_O 5 . din]trogentetroxide

sulfurdio×idc CO monoc boamonoxidei ',_ S2Cl2 sulfur dichloride

" o

__ 7iThe_:bmOt;Cs?bOn bond length'in benzene is 139 Pm. What-is this bond length expressed

' A. 1.39x10 -9 B. 1.39x10 -7" @1.39x10-6 D. 1.39x10 -5 E. 1.39x10 -4 • .. ",

4. A 46.2 g piece of nietal wasadded to a graduated cylindel: 9omaining 32.2 mL of water.

After the metal w'as added,, the water level increased to 4_-.6mL. What is the density of the . .

metal expresse_t in lb/in3? " " " -" . • - 19.,._ t,v,L-

A. 2.08 x 10-2 B. 5118x 10.2: .1.35 x 10-1 ,_,._' E. 6.65 x 102.

" ." - . . ?

• 53Cr3+ has protons, neutrons, and electrons. ,0 V'/-_(I.--

24,53,24 . B. 24,29,27 C. '24,29,11_ _24,'29,21 _24,53,21-

Wh " "ich of the follo'X,ing is entirely correct?. " " . .. I _ 4 _'_ . 6

• ' - '_ " " : _ " _ "" "/" ZA'_-_O CaS " "- calcium sulfate . ...

_(_ 2.. Fe(OH)3 iron (I) hydroxide " i'_'_3._ ,_.z["_.'2-" 3. MgC2H302. •magnesium acet/ue" 5, _ I_ _'._1_

AIN " -_. " aluminumnitride .... -''__- " 'Na2SO3 z" -. sodium sulfite _ .., "" _- -

/ © .,u.-A, l:and 3 4and5 1,-2, and5 2; 3, arid 4' ,E(. 2, 3, and 5 - "

A student performs the•followingdalculafio n based on data measurements obtained in lab._" What value should be reported for this _/dculation? ;. "

_0,_,_ . _I,_I_ _ _-_.GO_,_,i;•_/\ " (49.913 + 10.42i x (26.82 - 16.9)

41.3-x 4.306 ,. __'-/7 ,_ "7-0"/_..,- . . ,-

_37.__'_e,

' / The' melting poini of oxygen is -361.82 °F. What is this temperature in Kelvin? " "• i, • . o • - • -"

_. 54.36." " @ ' .. -"A -619.2 B. :-218.8 3:46.1 E.492.0

1

" Page 1, v4 . - " ....

. ., ." -.-_

J

Consider the chemical formulas be]ow., In each one, M-represents an unknown metal.

Which of the follo,a,ing assignments of M can be correct? i • ' •

"'", . O Mc.2 M=K _• • 3(PO4)2 M = Ca .

_MSO 3 M = Na.,. t_- M20 M = Li

5. M2(CO3)3 M= A]

1 afi'd'2.A

2and4 1,2a.d44 23 nd4 E. _/ . _) _ . " . . .2,4;and5

_:ff/. / Ernest Rutherford's'gold foil experiment determined which of the i'ollowing?]

" - 1.' Neutrons reside in the nucleus of an atom.

2. Electi'ons'are distributed evenly on the surface of an atom. - "

(_ Atoms are mostly empty space due to the relatively small size of the. : nucleus in comparison to the si_6 of the atom.-. " " .,

4_ The charge-to-mass ratio of the electron. -,

OThe presence of the nucleus within the atom• " " . .

A. 1,3, and5 B." 3,4and5 //1_. 1 and3 " and 4 . and5 " r

, g0oUnit 2 - Stoichiometry - .. . -

I t,*,ol _..../.200_lW/.g-gv_olt-t--vg't_..). • SO2 reacts with H2S as follows: "7"59. UvSx gzt.07_ _ -,, "

2H2S + 802 --" 3S + 2H20 12aS _50/.-_ "t_"_'_°'1:'t'_1610"b_lg-'lb_tt-.O_O- t_o _ _;Oz-

When 7.50 g 0fH2S reacts with 12.75 g of SO2, which statement applies?. .,

(_ 6.38 g of sulfur are formed. B. 10.6 g 6f sulfur 5re formed. .'-010216 moles of H2S remain. D: 1.13 g ofH2S remain._ " , ' - .

E. SO2 is the limiting reagent. " , - : . .•"

A substance has an empirical (simplest) formula of CH3 and a molar mass.of 30 g/mol. The.. • . "molecular formula is:

C) "A.'CH 3 B. C2H 6 D. C4H12 _i_C2H3C3H9 .. -..

13. What mass of calcium chloride, CaC!2 , is needed to prepare 2.850 L of 1.56 M solution?

• . .,A- 25.9g B. 60.8g C. l,lg D. 203g (E)_193gM_/ .- f

-! -

Naturaliy occurring element X exists in three isotopic forms: X-28 (2.7.977 amu, 92.21%abundance), X-29 (28.976 amu, 4.70%abundance), and X-30 (29.974 amu, 3.09%abfindance). Calculate the _/tomic weight of X. "

A. 28.1 ainu "B. 54.0 mnu 29 u D. 7Z7 amu E. 36.2 amu

M" ,o.k " - . ...hi. I.gt0" / - _. . ",'7,0_ iq_0t'- (D._.et-'-rLam61 , , g_li_a,_"

,to.0_" Page 2. v4 q7_ .Of_. _-

" " fermenta!!onreacti.onofglucosel "'' m"_ 0 "_."3"_' " "'" : " ' _ _:: ;].Con,i!:,: I h _

• '. iX-v,,ly yeast .' ' . . " .... ' " " " . • "" •ta ,,\ . _ CdHI_O _ _ 2C_HsOH -F2CO 2 . " ._ " ' .-

" . • " - .,- ,. .- . • -.: k0" "A 1.00-mole sample of C6H 1206 was plaeeo in a vat with 100 g or yeast. If 46 grams ol . - "

. C21ZI5OHwas'obtained.what Was the.15ercentyie{dqfC2H5OH?' .;. . ' . . - ' ".

" A..50.% .... " B. _56% .. " - " :: C...100% "

D., 42% Onone of these z .• • ., . • " . - _

_. /. Vitamin C.contains the. elements: :C, H..and: O'.. it. is known to contain../40.9°/o...C and...4.58%.H by mass. The molar mass OfVltamm C has been found to be about 180. The molecular, 0 : _'_'..q,2,_,

-formula for vitamin C is:. • . C la0,-

A. C2gjO 2 C3H473' "C. C4H604. D. C6H806 C5H807 .

• • . tt- ._ :. I17. A 6.32 g sample of potassium chlorate was decomp0sed according to the following. -equation: • O_2-_jl _o I ... O ": • :-17.

• 2KCIO 3 .--' 2KC] +',302 "_ ,all,'Tp_-6-t "°xtS;;_

How many moles of oxygen are l_ormed? "; 0 _l _-/0"7 '0'7 va,R7{. _ 03 .,_._._.O_7..-_. . . . " . '- ..7.. _-61%

A. 1.65 B. 0.051 C. 0_0344 _.0774 • E."9.48 _ C' 0i )0_:'_- v,o I 0z-r-,7.._t'g.' What is the sumofthe coeffiments of the following equatioh when•it.is balanced using. _i_:.00

. - " _la.ousmallest whole number integers? .... . ' ._; _-i_,_C,O "

y-dNaNH2+TNaNO 3 -,gNaN 3 +aNaOH ¥.:NH 3, QD. ;,';. _ . __. .

A, 5 B. 6 7 D. 8 E_ 9 t'u.,:,:: "q .c

19. For which compound does 0.256 m01e weigh 12.8g7 (_q ,_: O.:.,- .t

A. C2H40 B, CO 2 "'(_CH3Cl. , D. (J2H6 E...Sn " " ""

6 _. What is the molar ma_sZs£a/?et_4a_to_(4H50"H}?"('_°)67_._'_'°o°_)h,_l,'o}O_( I:0_)-':--d_l,t-0t_ f_ 9

"," A. 45.07 8.90.... D. 34.17"-. 62:07 :

" " "2 _V",:.;-'t:q"-'"" '

" " "- " _ - " ' " ' -'l,_--: Unit 3 - Thermoehemistry ,, "_ ," , : /g j., 0

_) Using the data below calculate the standard erithalpy of formation for gaseous sulfurtrioxide in kJ/mol. " ....

S (s) + 0 2 (g), ---, SO2 (g) " ' .... AH°=-296.8 kJ .

SO3 (g)" ---- SO2 (g)_+. 1/2 02 (g) AH° = 9879 kJ - • zL.• , ., .

A. -9.89 x 101.1_J/mol -.• : "B.'--1.484 X 102 kJ/mol. -l. 79 x 102 kJ/mol "

D. -3.957 x 102l_J/mo! . - E -7.914 x 10.2 kJ/mol .

Page 3, v4 .:

. " . ,% 7 _

Calculate AH° for tlie industrial synthesis)of isopropyl alcoh61 ('C3H80) from pfopene

(C3H6) shown below: ., :• ,J _ .

.. ' , J

777. ... I. I . I • - /o\H_C -C--C--H H

I " " I I IH H - H H

. , ,-

' @" " "-69 kJ D: 265•kJ E. 8799 kJA. -265 kJ B. 69 kJ "

23. A twelve flfiid ounce can ot"Dr. Pepper®.lists the calorie content on the nutrition label as

150. kilocalories. What is this value in joules?• o .

O'r'.2;1o5A. Y59x 101 B: 6:28x 102 C. 3.59x104 D. 1.50,x10. _ 8• -

A'20.0 g piece of iron (Cs -- 0.444 J/g.°C) at 100.0 °C _vasdropped into a container of waterat 25.0 .°Ci if the water absorbed631 J of energy, what "gasthe final temperature of the

iron? _ G[', "(5 _ _ _ /%'T_ (0"_J_0._'4_" ,_ 2,O9 "g' ('lg'-100)/_a?l" 0"_g_fT,__':_7_

A. 28.9°C B. 31.2°C • C. :_7.5°C D. 45.10C Q__171 °C

25 The enthalpy of formation is defined as theenthalpy change that takesplace wtien,. - ..

A. any quantity, of a compound !iaits standard state is forlned from its constituent.elements in their standard states. " " "

onemole in its standard state is f&me_l from its coflstituent elementsof acompoundin'theirstandard _tates. " -,

C. one mole of water undergoes a change in state from solid to liquid.D. one mole of water undergoes a change in state from liquid to gas,

E. one male ofa com.poundin.its standard state is formed from oiher compounds.in theirstandard states.,

26. _Calculate AH° for.the synthesis of lime (.Ca0)'from iimestone.(CaCO3).

CaCO 3". -:--, CaO (s) + CO2 (g) . _°.

P_. -1028.6"kJ • B. -178.3 kJ _178.3kJ 'D. 2235.5kJ E..-2235.5kJ .

/ Calculatetheam°unt°fheatnecessaryt°c.hange " ._ , . ,• 150• gofice at=10.0.°Cio liquid-water'at

12•0 °C. " Ol) Q, _ l,m _"/M" _."lO[_;/. .... X'"

6[, 2.0h_ _ tSq? _ (t-_,__o) l..': _-r"/ "

/_. 1.38x103•J "2"0_ glg'l_Z" 8 •. : . 0xl03J t C. 1.07x104J.. .D. 6.07'x104") E. 3.47x105. J t. : "

I

28.' Accord!ng to the reaction shown be!ow, •what mass (in grams) of oxygen ga_ reacted in : " •

order tOrelease 2".50x 104 kJ of energy.'? . " '.IciTf/ " :' " ; " • ."-"• " CiH8"(g)-+5021(g) 2"'3CO 2(g) q-;H20(1) "_ '; ;14° :222!'k}: "' "

" " A. 1.13x.101g 13. 3_60x102g @l;80x103g D. 3,55x104g .E...1.78x'109g "

Page 4, v4 ¢

" U

29. A 45.5 g-sample of a metal was:heated to225°C and placed in a coffee cup (:alorime.ter •- "

containing: 173 g Of water at 22..9°C. The final temperat_e of the water after reitching.equilibrium was=32.1 °C. Calculate the.specific heat of the mefal. , : _

,4 ,.

"L , , l ""

@ :: _ . A. 5:25 x 10-1 J/g.°C BI 4.93x10 -1 J/g.°C 7.59 x 10-1 J/g.°C.

D.,:l.,i6 x 1_2 J/g:°C "'" E: 3.33 x 102)/g'°C " " ;" :;"/

• How muchheat in kJ is released in ti_ereaction of 10.00 g ofAl with15.00 g ofCl 2 in.the "

_"_ t"-t reaction slaown below?( - _ -

- , r. ,

,2 AI (s) + 3 CJ2 (g), --" .2 AICI 3 (s} AH° = -I40814 'kJ "

" A.,_ 99.32kJ , B. 151.5kJ 198.6kJ, D. 298.0kJ E.' 522.01IJ ,-.k=..,'

Unit 4 - AtomicStructure & Periodicity , ._..

symbol forthe element? " .. ,.] If an element has tl_efollowing electron configuration, what is the " " •

2,,2,, 2,, 2,, Z,,9,, 2,, 2,, 1:_ , " ---s zs zpxzPyZpzJs :_p.x_Py_pz ,

"A: al B. Si P D. s .: , E.-CI.

. . What is the electron configm'ation of the Ni4+ ion?

@A. [Ar]3d6 B. [Ar]3d 8 C. [Ar]3d54s I D. [Ar]3d64s2, [Ar]3d44s 2

: one of the spectral lines in the emission spectrum of mercu_ has a wa),elength of .-•L 6.234X10=7 m. "How much energy is emitted if 1.00 mole of mercury atoms emits light of

6.234xI0 -7 m? Express your answer in kJ/mol "

A. 127 kJ/mol B. 485 kJ/mol ('_)19"2 kJ/mol.i _-_:: ._fA"I°t"

D. 5.56x10 -1 kJ/mol E. 1.74x10- kJ/mol ibqAlaTal'k.'_' __ .kaA Which ofille following species has tile largest radius? _ .... "

A. K- . B. Ca2+ - CI :D. CI--. " ; .

Calculate the frequency of a photon emitted by a hydrogen atom when _melectron.makes a.transition from the fourth to the second principal quantum level

" 6A7 2.18x10-18'HZ B. 6.17x1014 Hz 2.99xl Hz/' 3

".D.'l.31xl03 Hz E. l_83x108.Hz" ' ,, : -

36.. Calculate.th_ wavelenght of yello_v light of frequency 5.20x 1014 Hz. V

' 2 .... " 382 rffn @5 nrn "-5 0rlm B.l150 nm nmA. " C. 173 D. 76 .

. h e}ement that has four elect ons in its ;uti_r shell in itsground state is -.,. ,.

A.'.Nb. B. Cr C. Sn i " "':" ""

,-° •

Page>5:v4 : -,.. "

Which s{atement is false? " .. ' .

.,_ If an electron 'has the quantum number n = 3, the electron could be in ad sublevel.B. If an electron has the quantu m number t = 2, the only possible values ofm t

areOandl.. . • • " : .

If an electron has mt = -1, it haight be in a p, d, orfsublevel I_utnot ifi.an .qsublevel.An electron that has n = 3 cannot be in anfsublevel. _ ' :

'_ An electron that has n = 5 could be in an s, p, d, orfsublevel. .."

39. How do d orbitals differ from one another?

A. Each necessarily has a different degenera_zy. '

B. They have different t values._ Their distributions differ in spatial ori_/ntation.'13. Each d orbital must have a different value for the eleciron spin.

E. None of these, d orbitals are completely identical to each other•

40. Which of the following has the lowest-first ionization energy? "

O boron _ B. beryllium C. nitrogen D. carbon E. oxygen5c t4 ' C 0f

I- 0

2.. 0,1

'_ o,_,z.

4 o._,"z.,!,

,9 O,_,_,_,'_

4

Page 6, v4

,r

_J

I

PHYsIcAL AND CHEMICAL CONSTANTS _ " _- -,

Atomic mass unit 1 amu _ '1.66054 x 10.27kg - "

- " 6.02214 x.1023 ainu'=-1 g • "

Avogadro's number N'= 6,022 x 1023"/mol ,-Boltzmann's constant k = 1.38 x 10.23J/K

-- Electroff rest mass .m== 5,486 x 10.4amu"

= 9.109 x 10 _8 g " "

: Faraday's constant : F = N e = 9_6485 x'104 C/mol ,.. " "

: Gas constant. R - N k 7- 8 3!4.5 J/(K.mol)

i) "': = 0.082058 L.atm/(K.mo -

Heat (calories and Joules .,, 1 cal = 4.184 J

Neutl:on rest mass - . m. = 1.00866"amu .,', - ..

- • =.1.67495x 1024 g. "

pi n = 3.1415926536 "- . • . .

Planck's constant h = 6.6260755 x 10 -34 J°s

Proton rest mass mp -- 1.01)728'amu •

. ,= 1..67262 x 10.24g

Speed of light (vacuum) c,= 3.00 x_108 m/s , .

Volume of'a cylinder V=h_r 2 (h'= height, r = radius) ; . .

: ENGLISH/METRIC CONVERSIONS.

"1 lb.= 16 z: =453 6 g 1 mile = 5280 ft. ;"I [n.=2154cm " ": [ kilometer=6.214x 10"_mi'le _ " "

l'gallon 3.785 liter " - ' " "

RYDBERG EQUATION

I " (-1 "_" '1 "

-. /=R(I_ _1 ) AE=-chR[nf2 :,ni 2_. _nl 2 ,'n22 ' . .

R= 1.097 x [07m "l chR=2.18x 10"18J.:' - ' " .'

.=

Periodic Table of the Elements1 - •

ti Jc'2, -k'g _z] _3_2_L 11 He:1.008_ 2: " - " - 13.: 14 15 16 .17 4.00 ,_

3 .. _. : ,7,..v: _ 9 "I 0 _-,_ ].'2 Li [Be) ,, ; (BB) (C).N{._ Ol F N/_ "'":6.94 9101 - ' 10.81 12:01 14.01 16.00 19.00 20.18 '

--r---T- " '- " .- . 13. 14 15: 16 ; ..3 Na Mg ' " AI, Si'. P_ ,,S. ;CI) Ar ,,¢7_22.99 24.30 3 4 5 -6 " 7 8 " 9 _ 10 _ " 11 1"2, 26.98 28.09 30.97 32.06 35J45 39.95

19 20 21 22 23;r'24_ ,25 26 "" ' 28' 29 30. "31' .32 33 34 35 364 K Ca Se Ti, V _Cri Mn Fe' Co Ni Cu Zn' Ga Ge )ks. Se, .Br, Kr- 39.10 40.08 _4.96 47,88 50.94 52.00 54.94 55.85 58.93!58.69 63.55 55.38 69.72 72.59 74.92 78.96 79.90 83.80

: , _37 38 39 40 41 42'. 43 44 ' 45 46. 47 48 49 50 _51 • 52" 53 ;54_"

5"Rb Sr' Y. Zr Nb.,Mo Tc Ru Rh Pd Ag Cd .In Sn . Sb Te '/6 X_ : :' '85.47 87.62 _8j919:_._292.91 95:94 (981 I01.1 102.9 106.4 107.9 112.4 114.8 118.7 1_1.8 127.61 .9 131.3

" .\- 55 56 73 74" 75 76" '77 78 79 '80 . 81' 82 83 84 85 , 86 ,6. Cs Ba i Lu Hf Ta .W Re Os Ir Pt Au Hg TI' Pb' Bi' Po At Rn

132.9 137.3:175.0 1"]8.5180.9 183.8 186.2 190.2 192.2 195.1 197.0 200.6 20,1.4207.2 209.0 120911210) i222) °87 88 103 104 105 106 107 108 109 110 111 112. r114 " 116 ._,. .

" ' 7 Fr Ra Lr. Rf Db Sg. Bh" Hs Mt Uun Uuu Uub . Uuq ,, Uuh ,',-"(223) 226.0 _26011261) 12621(263) '1262) (265) (266) 1271) (272) (277) 2 (285) • "(289i " " " ' .

Lanthanides- • ' _ :_." : ..... •• • .? . 57 58; 59 60 -61 62 63 64 '65 66 67 68 69 70 '

La Ce Pr Nd-Pm Sin' I_U "Gd Tb Dy Ho .Er Tm Yb'.= 138.9 140.1 140.9 144.2 (145} 150.4 152.0 157.2158.9 162.5 164.9 167.3 168.9 173.089, 90" 91 .92- "93 94 95 • 96. 97 98 99 100 lob -102 -

_Actinides Ac Th Pa U Np Pu Am" Cm Bk Cf Es Fm Md i_/o ,_ .227£ 232.0 231.0 238.0 237.0 (244) (243) 1247) (247) 1251) (252) (257) (258) 1259)I ; " " "

(Mass numberg given in parentheses represent the mas_ nuthbey.of the most stableqsotope.)

" , , : , ' ,

Is

SELECTED STANDARD MOLAR ENTHALPIES OF FORMATION AT 298 K - • • :

Cl_emical Chemical, - • Standard Molar EnthalpyFormula Name of Formation (kJ/tool)

AI2031sl Aluminum oxide -1675.7BsHg(I) Pentaborane +73.2BzO3(s) Boron oxide " " -1263.6BaCO3(s) Barium carbonate - 1216.3

Ca(Hv_sO4)2(s) Calcium dihydrogen arsenate -2346.0CaCO3(s) Calcium carbonate - -1206.9.CaO(s) Calcium oxide -635.1

"Ca(OH)2(s) Calcium hydroxide -986.6 • - "" -CCL(I) Carbon tetrachloride , - 135.4 •

CH_(g)'. . . - /vlethane L74.8 _"CH3OH(g) Methanol Vapor -200.7CH3OH(I) Methanol -238.7 "

. . C.,,H5OH(I)" Ethanol -277.7CO(g) Carbon morioxide - 110.5CO2(g) - Carbon dioxide -393.5C2H2(g) Ethyne (acetylene) +226.7

• - C2H6(g) Ethane -84.7

CjHs(g ) Propane - 103.8 •- - _ C4Hio(g) Butane -888.0 -

CuSO,_(s) " Copper (111sulfate -771.4

HNQ_(g) Nitric acid -135.1. H20(g) Water vapor " -241.8_ "-

" H20(I) Liquid water '-285.9

H3AsO4(I) Arsenic acid "-=900.4 ! ..Hj PO4(I) Phosphoric acid - 1279.0

. - HaSO4(I) Sulfuric acid -814.0 J -HF(g) . Hydrogen fluoride :-271.1 ;HCI(g), Hydrogen chloride " -92.3 _ ,HBr(g). ., Hydrogen bromide- -36.4 "_

Hl(g) Hydrogen iodide +26.5-_ MgSO4(s) Magnesium sulfate - 12"84.9

Mg(OH)2(s) - "Magnesium hydroxide -924.5

, r Nal_l,s) Sodium fluoride =573.6, .-.NaClts) Sodium chloride .-411.2NaBrts; Sodium bromide -361.1

NaHSOAs) Sodium persulfate +1125.5• Nal(s) Sodium iodide :-287.8

•'- .' NaNO3(s) Sodium nitrate +467.8• • NH3(g ) Ammonia --46.1

", - NO(g) Nitrogen monoxide- +90.3 _.-. NO2(g) Nitrogen dioxide +33.8 '_

. " N204(g ) Dinitrogen tetroxide +9.2• - I:'CI3(1) Phosphorus trichloride -319.7 , .

PCIs(s ) Phosphorus pentachloride --443.5P,,O_0(s) Tetraphosphorus decaoxide .-3110.0

SiO2(s) Silicon dioxide (quartz) -910.9SnCI2(s) . Tin (I1) chloride -325.1SnCL(I) Tin (IV) chloride -5] 1.3

SOz(g ) Sulfur dioxide "-296.8- - -from "TheNBS Tables of Chemical Thermodynamic Propemes," 1982.

Specific Heats: HzO(/) 4.184 3/(g o'C) " A Hr_o° of H20 6.02 kJ/mol _,

H20(s) 2.06 J/(g .*C) AH,_p of H20 40.7 kJ/mol, H20(g ) 2.0 J/(g • °C)

Bond Dissociation Eners, ies in k.1/mol:

C--O 315 C:-H 413 N--H 390

C=O 745 (C=O in CO 2 = 799) C--C 348, N--N 240

: C_-O 1070 C=C 682 CI '--- CI 243 ' -'O=O 498 C-=C 839 N_N 945

O -- H 463 C -- F 485

H--H 432 C--N 288 " "•

O--F 190 C--CI 330 .....

F--F 155 ' H--CI 427 - -

DO NOT TURN THIS PAGE UNTIL DIRECTED TO DO SO

Chemistry 1315 EXAM 3 Spring 2009

TOM

Name: _instructor:,ID Number:

1. These tests are machine graded; therefore, be sure to use a No. 1 or 2 pencil'for marking the answer sheets.

Completely blacken the answer circle, if you change an answer, erase completely the previous mark.2. Write the letter code of your lab instructor (see table at bottom of this page) in the first box of the section

marked "NAME". Then in the next box (do not skip a box), write your last name. Skip a space and then

fill in your first naine and middle initial. Example: If Joe B. Doe has Gopal Abbineni, Section 36for a labinstructor, then his answer sheet would look like:

EXAMPLE: 1st Box T.A. code (see below)

If your whole name does not fit, put as much as will fit. Then blacken the Corresponding letters below each

space on the answer sheet. . "

3. Fill in your ID number in the space provided, beginning with space "A". (There will be an extra box.)Then blacken the circles corresponding tothe numbers below each space: ,. '

4. In the "special code" section, indicate in column K the test form you have:Mark in Column K Test Color Answer Sheet Color Swipe

I Blue Blue•

2 Gold Black

3 . Pink Red

4 Tan Brown

Mal_e sure that you mark your test color in column K, and that the coiored swipe above your name on theanswer sheet is the same as your test color.

5. In the "Special Codes" Section, indicate your lecture instrdctor in column P. Please fill in the appropriatecircle.

Instructor Section TimeAbraham 001 10:30-11:45 am TR

Clifford _ - 002 11:30,12:20 pm MWFClifford 003 8:30-9:20 am MWF

Thus if Joe Doe's lecturer is Abraham, Sec. 001 and his.test is GOLD, his "Special Codes" section would be:

;LMNo;

@@(DO ..I('_ ('_ (_ (-"_ ("_

6.. The time limit on this test is 150MINUTES.• 7. READ THETEST CAREFULLY.

8. Do no(turn this page until directed to doso.9. -Use this booklet for scratch paper. You may not bring your. own scratch paper to the test.

10. Mark your answers in this booklet, as well as on the answer sheet, so that you can check your score withthe key after the test.

11. Each Unit Score will be calculated from the number of correct answers. There is no penalty for guessing.

12. Students will be held responsible for any corrections made during the test.

13. Students who arrive more than ten minutes late, or arrive after another student has left, will not beallowed to take the examination.

Code Section(s) Exam Room IN Code _ Exam RoomAbbineni, Gopal A 36. DH 206 McKee, Emily K . 18, 33 DH 211

Beal; Jennifer B . 22 DH218 Qiu, Penghe L 37 DH200Fontcnclle, Lucas C 14, 38 NH 270 Quinalty, Leslie M 13 PHSC 201Gala Marco, Amparo D 12, 27 PHSC 201 " She, Wcifeng N 17, 28 NH 270

Guan, Rong E 29,40 DH 200 Tang, Hui O 34 PHSC 201llageman, Serena F 30, 35 DH 21 I Wang, Xiaoru P 25, 26 NH 270James. Robinson .G 43, 44 DH 21 I Xulu, Alex Q 31 DH 218

Kirby, Katie H 24, 45 DI! 21 I Zhang. Xiaohan R 2 I, 41 DH 206Li. Dong I 16, 19 DH 200 Zhou, Yongyao ' S 46. 47 DH 200McClain. Mike J 42 PHSC 201 fl

• +

Unit 3 _ Therm0chemistry

' 1. A sample 0f ei.hyl alcohol (Cs - 2.46 J/g,°C) at a t_mperature of 45.7 "C was added to acoffee cup calorimeter containing 150•g of water at 23.5 °C. The temperature of ihe mixtureupon.reaching thermal equilibrium was 28.6 °C. What mass ofethyl.. alcohol was added.to .the calorimeter? • • " ".

A. 18.2g . B.:,26.3g 76..1g ' D. 8,55g E.'320. g .

2. Given the data for octane (C8H 18) below, calculate the amount of energy needed to C0nvert

114 g of liqt, id octane at 22.0 "C tOgaseous octane at 129.5 °C. ., :

' "' ' " • )Vleltln',,.,,, _,v'-,,n'_int:"..._t;'.__...,,, or._." . "Boilingl_oifit: 125.7 °C <"

,. Cs(i ) . • 2.23 J./g.°C ._,? , , . ' ., Cs(g) " 2.77 J/g:°C " _,' " r

, AHfus 20.7 kJ/mol

, AHvap 41.510/m01 . !-, , :.. ,

" . a. 2.73x104J" B.' 2.76x104J O3.39xI'04J D, 4.14x104J. E.6.90X104J, . % , • •

31 The highly exothermic thermite reaction, in which aluminum reacts with iron (III) oxide to.produce elemental iron and aluminum oxide, has in enthalpy of reaction of:-850 kJ: What ! _

: mass.of iron is formed when 1075 kJ of heat are released? ..• ,

A. 1.36g B.2.56g O70.6g D. 141g E. 5.10x107g

4. I f h mass of 80.7 g of H20 reacts with' excess SiFt, how much energy (in kJ)wouldbe : :

exchanged between the system and the surroundings? '

SiO2(s) + 4 HF(g)' '--'• SiF4(g) + 2 H20(i ) ' AH°= -190.'1 kJI

©0 "A, -852 kJ' . B.-426 kJ .0471 kJ D. 426,kJ E..{852 ,_kJ,O • •

5: Calculate AI-Irxn for the reactmn C(s) . H20 (g) _ CO (g) +. H2 (g) given the ' ',folio i g data: ....WU • .* : ,

C(s) + 0 2(g) --. C02(g) •. AH°=•-393.5kJ2CO (g) + 02 (g) -' .2'CO2 (g) AH_= -566.0 kJ : , .-

' • 2H 2(g) + 0 2(g) --* 2H20(_) . , All°=-483,6kJ ,; ,

•' A. 13113 kJ B. 373.1 kJ. =262.6 kJ D. -918.3 kJ E.--1443.1 l_j

6, Calculate AFI° for the r6_ictionshown below:• 1

Iq H : H -

2 --H + C1 --"C I _ N_N + 2 H .----CI

• , >." > ' H 7_

A. 71 kJ Q_) 1241 kJ " C. 5942 kJ D. -71kJ E. -1241 l_J

7. Given that the molar heat capacity of gold is 25.41 J/mol:°C; how much heat isneeded to _raise the temperature of 10010g of gold from 25..0 °C to 75.0 °C? "

A. 1.29x 10-1J _ 6.45x102J C. 5.01x103 JD.' 1.27x105J . "" E, 2.50x107J " .- :'

page 1, v3 . ..

°

8. Calculate AH°f in kJ/mol for benzene. C6H6, from the following data:

.2C6H 6(I) + 15 02(g) --' 12CO 2(g) + 6H20.(1) AH°=-6534kJ

A.4.83x101 kJ _-4.83x 101 kJ C. 1.80x102kj

D. -1.80x 102 kJ E, 6.48x 103 kJ

9. Combustion of a 28.00g sample of trail mnx in a bomb calorimeter determined that 502 kJ of.energy was released. This energy value expressed as kcal/g would'be which of the following?

A. 4.291_cal/g _ 7.50x 101 kcal/g C. 1.20x 102 kcal/g

D. 2.10x 103 kcal/g E. 3.36x 103 kcal/g

10. Which equation below correctly represents a standard enthalpy of formation reaction?

A. CO2(g ) + C(s) -" 2C0(g)

2N 2(g) _- 302(g) ---, 2NO2(g) -_ 2NO(g) .,C.- 2 NO 2 (g) ---, N204 (g)

D. CO 2(g) - H2(g) ---' H20(g) - CO(g) -

E.'I/2N 2(g) + 1/2 02(g). --' NO(g)

Unit 4 - Atomic Structure & Periodicity . [_/c"_ ._

11. What is the electron confguration of silicon, Si?

_1 s22s22 s23p63 p2 ls21 p62s22p 4

_. 1s21 p62s22p 2 Z_./ ls22s22p 62d4 •

E. I s22s22 p63s23 p4 --

12..The number of electi'ons present in the p orl_itals in the outermost electron shell (major

energy level, n) of tl3e halogen atoms is I _ .... .

A. one. B. two C. six D. seven fiv " _. ,,-I. _'

13. Howman? different orbitals in an atom can have the designation " 7. _i? ._..c/,,_ -'f-n= 3,£= 2;ms =-_1/2? '" -3 ._,._,_,_,7.,,,,

@fA. 1 B. 8 C. 3 -" . . E. "10_]

"{') _. Calculate the frequenc_ of a photon emitted by a hydrogen atom when an electron makes a

transitionfrom the state with n = 6 to n = 2. _[_, ,2._-¢_0a9")

A. 2.99x103Hz B. 1.3xl03Hz ('_4.84x10-19Hz (), ,_.N_D. 2.18x10 -18 Hz E: 7.30x1014H z _ k_,l_, ,o',--

15. Which of the following is a possible set of quantum numbers for a 3d-electro,a? _.--_.,-1:_• -"b_,. to .

_. "n 2, m20, ms 3; 1, m2 0,m s71/23,_1._- -1/2 1

./Un = 3;1 .=.1, my = 1, ms = 1/2 .._." n =3, 1= 0, m£ = o, ms = 1/2/E_. n = 3; 1= 1, m e=-l,ms =-1/2.

Calculate the energy of one mole of plaotons of microwaves.0f frequency 3.00x1011 Hz.

A. 5.97x 10-14 J/mol B. 1.99 x 10.22 J/mol _:4.52 x 1044 J/moJ• " D. 120 J/moJ E. 2.21 x 10.45 J/nrol .,

-.i

Page 2, v3

Y

._ Wh t i try( ! f IF3? ; _ _ 'a s the molecular geome shape o ' -". .

/ trigonal planar _trigQnal pyramidal • Osee_saw .: .: I._.:..

/T-shaped , .. _. trigo:albipyramidal . _ " .• .." g,

26. The molecule below.has sigma.and .pi bonds, and an approximate bond angleof. " for the O - C - O bond'labeled with an asterisk (*) bblc}w. ..

I•

sigma, 2pi, 90°' • " 6sigma, 2pi, 109.5° .'C. 7s!gma, lpi, 90° ." D. 7 sigma, 1 pi, 109.5° sigma, lp!, 120° • . . . '."

27..Consider the followingatoms: C, N, O, F, Na, and K. Which statement below is_? ' '

Z A bond between Na and F is called'anionic bond. ' " " i' "

,_B) A bond between carbon and fluorine is less polar than a bond between Carbon and ..oxygen. ' -_ " . • . . . ;" .

,/_A bond betweentwo atoms of oxygen is'a nonpolar covalent b0nd. - . '..... _. The bdnd between K'and F will have greatei ionic character than the bond between Na

and F.

' /E_._Of the atoms listed fil_ovelfluorine is the most electronegative.. ,.

j,/c ?(:28. Which set'of hybrid 0rbitals is used bythe central fitom of the molecule XeF2? k" • .:_- ' -'

A. sp _ B. sp2 C. sp3 _ sp3d ,E. sp3d 2 ,

.... L _Which.of.the following molecules contain at least one nolar covalent bond? _. I "

' 4 NaCl • -- '" -_7_... . . CCI4 -'-" .

"" ' _ n,,HgCI2' ': 'g_-"" _'" :• " . . . ,Jr z : - "-/_(9,,);'1_

/,5. H20 ., ,

C_N_. Which of the lbllowing m01ecules are polar. Oi7_ ,,zr gz,t- "' 65-, _'_--'%. - . i • " . . ,----, .L" . . _v .._.. ..,;-.-! ..,

. . • • z. Aet_4 _'-.q.o,,_ " -z_ C_ '

31. An unknown sample ofaga s has a density of 5.54 g/L at 2.20atm and 37°C. Which.of the '• " lbllowing iS the gfis? . • ...... .. ,

_ S CI½ S '; D. CO 2. :" ,'E'..Kr',: . :,"

,. _ . Page 4, v3 __ _'__

. .-.-z---,; "z._.'_50r4_"l_o _

.. >%.. ".

_/ A gas vessel is attached to an 0pen-end manometer containing anonvolatile liquid'of " •"density 0.791 g/mL _isshown below..The difference in heights'of the liquid it/the two sides•l

of the manometer _s'43.4 cm when the'_itmospheric ' '+" ,+pressure:is 755 to_i Given that the"density•of mercury is 13.6 g/mL, the pressure of the encldsed gas.is arm

2,

• .- :•.

A. 1.03 0.9¢3 D. 0.990 E. 0:960

• " -_ f, >_33. In air at 25°C. which gas particle has the largest _lveragespeed?i: :- ,+_ -

,7,.02tg) B.Ne(g) Q_ He(g) . . D. NzCg) .. E.-CI2(g) . .

34. The presstire of a gas in a r gid container at•_is "]45Tom: What is the uressure of the _ :, ,-'C'.,_.

gasat:_SW. _1.15_ ._.+!.. "• ", . -_,_ _'_"'"A. 760Torr B.:li00Torr j C. 2"85Torr '_')5"_7Torr,".-E 773Torr , ' .

• ' (.o _e,.m ,gv,, " _ .. ca, .. + - .35. What mass of_ will exert the same.preSsure as _1.60g of_ gas inthe " • • " :

.q, same coyitainer under the same conditions?. _ .... .. _ "/0,¢1 t,.;/,'V+ ,q,(a ,¢ "7- _ -

A 2.80g 1.82.g C..3.63g D. '40".7g . E. 4.60g 30,_1 -Z,_.OI- j - ,

36. The gauge presgure ofanearly "flai" automobile tire is about.12 lb in-2. Which of the -- '_ ' " "

.following pressures corresponds most closely to this pressure? " .

/ffz93000 Pa _83 kPa . /930 Torr I 930 kPa ,fir..D30m_tg:i,I_00 P_. " . "

37. What is the pressulTeof 20.0 g of oxygen gas,in a container of volume Z20 L at'-101°C? .....

(FA) 4.01 atm " B. 8.72atm . C. 2.35atmi D..802atm . E:. 4.71 atm_+"

": "" . / G._ L.. .<' " . "" ". " " , .. -i (.d_ ":'L ": ".. " _.• (_ ,N_. "_ sample of dry air (measured at sea-leyellSressure, _) contaifis 0.0129gbr . .- -"

_--_. x argon at '_. Calculat6 il_e]5artial pressure'of argon in the sample." +' .- "I,_I_.15_ :'_ : • - -" •

0.000323 atm ,;': i_(_. 0:00!32 arm -" ,.

" A. 0.00930 arm B'" 0"01SSatm "+ ;" " _"i._!- -. u; _--- 17pi_1_-?

D] "0.00160 atm E. • ;+ ,CI_:,

_(Z A ' . !V mmonia burns in air as follo_vs: : _,,_i ,+ -.""• _'1.- " , ,_,__ "

4 NH3(g ) 3 O2(g ) 2 N2(g ) q- 6 H20(g ) L4G"' _-+.-+'+"

How many liters ofN2(g ) are .f°rmedby. I_urning4.i)0 Iu of _. ' onia and'2.90 L of oxygen -.with all species at the same temperature and pressure? • • • . • . -,

. / A: 1.45L '_D/_.2.00L ' _" C. 8.00L" " D. 1:93L" - E. 2.90L : : " •

•; Ok_i wfiat i_stheratio of_ke rate of d f_sion ofH;_Te(g)a_ t6the'ratebfdiffus_ s,_ -:. ' . argon at_ ' ... + ' " . :+2-_.{'_g'r;' . .. :,' _,X<_::-" _

" C "_{13"1_ , . '"(rrll+e}rA'=?) ' ';" ' " "e""k_l_7_ef "'

' " " "d ' " A ' 0'5+5 B " 10 8 0 '1' IlL " " C ' l 0 " 3 0 8 i _+ _ O3.25" " : ' - I_. 0.'}7_'_'i"_ !;_+_ _i '• " . ". ,/._- " ' " : • , . .' • . : t _+, ,v_. .

" <;.,< :+,-Se+r . "-: ?.O0 t ;,U'-++ ..;,+ • ...."

• .., . .+0,o,. ,_¢+_,_.__ ... _;,+,,,. _. m+_----¢. Page 5, 73 .-. :,..i. _ . ++

• _hv' +• %'%' -" +'"• , +

" _,r

"PHYSICAL ANDCHEMICAL CONSTANTS . ....., :'"

....Atomic inass unit ' ' "1 amur= 1:66054x lb.2_kg - "

" _ 6.02214xA0_:amu=l g " - . ., .

Avogadrols nuinber N"= 6":022':xI"0V/tool . . .. -.: ." "Boltzmann's constant k = 1.38 x II)'_.J/K ""

486 ""Electron rest mass mo= 5. x 107 arriu - .

..... '= 9.109 x:l 028,g : ""

Faraday's constant " "" F = N e = 9.6485 x 104C/moiGas constant ,. R = N k = 8.3145 J/(K.mol).

" ' = 0.082058 L,atm/(K,mol)

Heal (calories and Joules) l'cal = 4.184 J

.- Neutron rest mass m.-:l.00866;amu . . .

I 6=/495 x 10_ g

pl _tL_3.1"415926536

:, ]:'lanck:s constant '" h = ¢5.6260755 x 10.34J,s " " "

Proton'rest mass . mp _ 1".00728amu= 1".6;7262xi]O "24.

. . d . ,- g -

Speed of iight i_,acuum) :c =73.00 x::108m/s

VolumegJ(a cylinder -. .. V=h_r z (h'='t_eight, r= radius) : .... " - "

ENGLISH/METRIC CONVERSIONS and MISCELLANEOUS CONVERSIONS --

lb. = 16 oz: =1.453.6 g .-1 mile = 5280 ft. . , . . ., '

in.'=2.54cni - 1 kilometer=6.214X 10-_mile "":" "*" :7,0

gallon'= 3.7"85 liter ". 1 cal -4.18_, J =,.

.. .- .. ,,', - . _,/ _ 5_,,/'-_7.

. . - RvbBErG EQtjATiON _ _-/_-(_')_"._.

.... . I__r(.i___' •' " Itn " n'i2-. 7. " "

'_'-. R=II.097x 107"ml. . -:chR=2.18x 10l"J _ . : t6_ "

: _I_160¢' ' PRESSUR :"i';"": '

' _l_" .'l atm= 760 tor£ = 29.72.in = 14.7!bs/in2 = 1.01325x105_,,a_/.,, :

•./.- o,,s "" " "-: '" "• _ Periodic,Table ofthe Eiements" ' " ''_'

" I -_. .... :" 18

I -'_"" , ,"1 . " ::. 2""H ".¢" _ " " ' ....., " "/] He

" " " " : l3 14 15 16, 17 4.o01.oo8_ 2 -- " _)0

3 ' 4 -." " I _. 6" 7 , 8 • 9 .- 10

" 0 ' _, . . *2 Li Be .,.. " " B 'C N • O ,;F,Ne6.94 9.01 10.81 12,01 14_01 16.00 19.00 20.18

11 12 " " _"" _13. 14 15 <16 .¢17 t18

3 Na Mg - - °' . : ; AI _Si "P S, CI. Ar,: 22.99 24.30 3 4 " 5 "6 7 8 ,9"' t'0"- 11' 12. [2619]]28:09 30.97 32.06 357453_).95

....... 20 21 1,22 ;-23 24 I 25 26 27 1'28'1 f29" 30.1 31 32 .33 34 35 '36

, 4 "ix" Ca Sc ,Ti'_ r VJ Cr ItMn_ ,Fi_ C0.1_Ni ' .ISu Zn'+) G a Ge, As Se Br Kr.39:10 40.08 44.96147:88 50:94 52.00154.94 55.85 58.93158.69 63.55 65.38169.72 72.59 74.92 78.96 79.90 83.80

37 38 39'1 40 41 42 I 43 44 45 1,46 ' 47 48 '1'49. 50 51, 52- ¢.53. 545 Rb Sr .Y IZr Nb Mo I Tc Ru Rh I Pd Ag' Cd In Sn Sb Te [ . Xe "7,:,

_5.47 92.91 95.941 t98"1 101.1 102.91106.4 107.9 112.41114.8 118.7 121.8 127.6 1.26.9 131.3 (4"3'55 56. ,71 I 72 73 74 I 75 76 77 I 78 79 _ -80",1 81 82 83. 84 "85 .86.

6 Cs Ba Lu'l HI" Ta W I Re Os 'lrl Pt . Au Hg TI Pb :Bi Po At Rn132.9 137.3 175.01178.5 180.9 183.81186.2 190.2 192.21195.1 197.0 200.61204.4 207.2 209.0 (209) 1210) (222)

87 88 ,103 I 104 105 106 I 107 108 109 [ II0 III 112 - 114 . 116 'o , . .

7 Fr Ra' Lr I Rf Db Sg I Bh Hs Mt IUun Uuu Uubl. Uuq Uuh ..(223) 226.0 (262) 1263)11262) (265) (266)1(271) (272) 1277)1 (285) - (289)

Lat than des " - ." , - '" 57 58 59 60 61 62 63 64 I 65- 66 67 68 69 70 -

. La Ce Pr" Nd Pm Sm Eu' Gd'ITb _ Dy Ho Er. Tm Yb :'. • 131_.9 140.1 140.9 144.2 1'145i 150.4 152.0 157.2158.9 162.5 164.9 167.;3 168.9 173.1]..... 89 90 91 92 93 94 95 96 97 98 99 100 101 il02,

' .... Aetlnides Ac Th P_l 'U NP Pu Am cm Bk Cf Es Fm Md "No''" '- i 227.( "_3°0 231.0 238.0 237.0 (244) (243) (247) (247) 1251) (252) (257) 1258) 2"59)

" (Mass numbers given in parentheses repre'sent ihe mass number o1:the most'stab!e isotope.) :

k _g.

. '. ,4 i • •

SELECTED STANDARD MOLAR ENTHALPIES OFFORMATION AT 298 K

Chemi_:al . Chemical Standard Molar Enthalpy - -Formula Name ' of Formation (kJ/mol) •AI2Os(s) Aluminum oxide "¢ -1675.7 • " - '

BsHg(I) Pentaborane , +73.2'•BzO3(s) Boron oxide. -1263.6 ,BaCO3(s ) Bariuz9 carbonate - 1216.3 :

Ca(H_AsO4)z(s) Calcium" dihydrogen, arsenate -2346.0CaCO3(s ) Calcium carbonate - 1206.9 q

• ". .CaO(s) Calcium oxide ' -635.1 " '"

. . Ca(OH)z(s) " (_alcium hydroxide -986.6

CCI4(I) Carbon tetrachloride - 135.4.CH4(g) - , Methane , . ' -74.8 -.CH3OH(g ) "Methanol Vapor " " -200.7 'CH3OH(I ) Methanol " -238.7 . .CzHsOH(I) Ethanol -277.7

CO(g) Carbon monoxideCO2(g) Carbon dioxide -393.5

C_H2(g) ." Ethyne facet) lene) .+226.7C_H_,(g)" Ethane -84.7C3Hs(g) Propane - 103.8C4Ht0(g) Butane . -888.0

CuSO4(s) Copper (11)sulfate -771.4HNO3(g) Nitric acid . -135.1H:O(g). Water vapor -241.8H20(I ) Liqtiid water -285.9HsAsO,_(I) Arsenic acid -900.4H3PO4(I) Phosphoric acid - 1279.0

H,_SO,_(I) Sulfuric acid -814.0HE(g) Hydrogen fluoride -271.1

HCltg) Hydrogen chloride -92.3 - - • .HBrfg) Hydrogen'bromide -36.4HI(g) Hydrogen iodide +26.5MgSO,,(s) Magnesium sulfate -1284.9.Mg(OH)2(s ) Magnesium hydroxide -924.5NaF(s) Sodium fluori_le -573.6 :.NaCI(s) Sodium chloride -411.2NaBr(s) Sodium bromide -36121

NaHSO4(s) Sodium persulfate + 1125.5Nal(s) Sodium iodide _-287.8

NaNO3(s) Sodium nitrate +467.8 -NH3(g) " Ammonia . --46.1NO(g) Nitrogen monoxide -_90.3NO.,(g) Nitrogen dioxide +33.8N,O4(g) Dinitrogen tetroxide ' +9.2PCI3(I) Phosphorus trichloride -319.7

l._CIs(s) Phosphorus pentachloride -443.5P,Ot0(s) Tetraphosphorus decaoxide -3110.0

SiO21s) Silicon dioxide (_t_Jartz) -910.9SuCI2(s) Tin (11)chloride -325.1SnCh(I)' Tin (IV) chloride -511.3 - , •

,$Dz(g) Sulfur dioxide -296.8u ofrom The NBS Tables of Chemical Thermodynaniic Properties. 1982."

Specific Heats: HzO(l) 4.184 J/(g ,*C) A Hro_io°of H20 6_02 kJ/mol

HzO(s) 2.06 J/(g .*C) . A H,w of HzO 40.7 kJ/mol .

H20(g ) 2.0 J/(g • *C)

Bond Dissociation Energies in ILl/mol:

C--O . 315 _C--H 413 N--H 390

C=O 745 (C=O in COz = 799) C--C 348 N--N 240C-=O 1070 C=C 682 CI--CI 243

" o=O" 498 ".C-=C 839 N-N." 945

O'H 463 C--F 485

H--H 432 C--N 288

O--F 190 " C--CI 330

F--F 155 H--CI 427. _ tg!(._,O.f[ ":'

t"n

/

DO NOT TURN THIS PAGEUNTIL DIRECTI_D TO DO SO "

, Chemistry 1315 _ . . EXAM 4 .•_ Spring 2009 _ .,

Name; _ Lab ln_truc:or: ( "["0 _I

I S__ r t • " " ' •

Number:ID .,

• .'_ 1. These te . . graded: therefore, be sure to use a No.:l°or 2 pencil for mm'kiffg ibe answer sheets.Completely blacken the answer circle• If you ch/mge an answer, erase completely the previous mark

2. Write the letter code of ydur lab instructoi" (see tgble at bottoin'of this page) in theflrst box of the section

marked "NAME": Then in the nextbox fdo not skip a box), writ.e your last name• Skip a_space and thenfill ifi your first name and middle initial• Example: dfJoe B. Doe l_as GopaI.Abbineni.Section 36 for a labinstructor• then his answer sheet would look like: - .

EXAMPLE: 1st Box T.A. code (see below) ..- ,-f

• If your whole name dbes not fit, put ag mucfi as will fit. Then blacken the corresponding letters below each'

•space on theanswer sheet. /_", ' " " ,3. Fill izl your lD number in the spacd provid6d, beginningwithspac_'_A!'. (Yhere will be an extra b0x 3 . ._

Then blacken the ci1:c!es corresponding to the numbers below each space .... .4. In the "special code" section• indicate in column K the test form you have:"

- Mark in Colunm K Test Color ,,, Answer Sheet Color Swipe " " "1 -Blue Blue

• 2 Gold Black

7- 3 " _ Pink . ..... . Red " t, -[4 Tan Brown •

Make sure that you mark your test color in column K_ and that the _:olored swipe above youn name on the ' '•"answer sheet is the same as your test color. - "

5. In the "Special Codes" section, indicate your lecture instructor in column P. Please fill in the appropriate, circle. : ",_

Instructor ' _ Section " Time " _ "• " Abraham "001 10:30-'11:45 am_ %TR " -

Clifford _)02 11:30-12:20 pm MWF '

Clifford _ 003 8:30:9:20 am .MWF

• fh _

Thus if Joe Doe's lecturer is Abraham. Sec. 001 and his test is GOLD. his-"Special Codes" section.would be:-%

• _PI_CIAL COI)I_ ....

' K L M N 0 P.

.. .,, ,@®@@® ....." db@(D(D(D / -.

J ®,@ ®® @

6. Thetime limit on this.test is 150 MINUTES. ,47. , READ THE TEST c_REFuLLY. '" -

8. Do not turn this.page until directed to do so. . .' :

..9. Use this booklet for scratcfi paper. Y6u may not.bring your own scratch paper to the test

10. Mark your answers in this booklet, as well as on the answer sheet, so thai you can check _'our score v.;iththe key after the test. " " " .._

1. Each Unit Score will be calculated from the number of correct answers. There. is no'penaltyfor• guessing.•-.12. Studentswill be held respongible for any Correcti0ns made during the test,13. Students Who arrnve more than ten minutes late, or'arrive after another student has left_ will not be

allowed to take the examination, f >'--

lnstructi_ Code _ ExamRoom _ .... Cede _ ExanlRoomAbbineni. Gopal A 36" DH 206 " -" McKee, Emily , K . " 18_33 D]-I 211 _ • "

Beak Jennifer B 22 _ DH 2t8 ,Qiu, Penghe :, L 37X" DH 200Fontenelle. Lucas C 14.38, NH 270 =Quinalty, Leslie M 13 PHSC 20I .

, Gala.Marco. Amparo D _ 12.27 f PHSC 20l" Sh_. Weifeng , - N 17, 28 " NH 270 "'

Guan; Rong E 29. 40 ." DH 200 Tang, Hui O ,/ 34 PHSC 201Hageman, Set:ena F 30. 35 . DH 21 I" Wang, Xiaoru- E 25.26 _":• NH,270.James, Robinson G 43, 44 DH 211 Xulu..Alex Q 31" .. DH 218

" Kirby, Katie H 24.45 DH 211 Zhang_ Xiaohan R • " 21.41 DH 206

• Li, Dong • \ 1 16, 19 DH 200 _ Zhou, Yongyao S 46• 47 DH 20[)?McClairu Mike J 42 PHSC 201 .

1

- Unit 5 - Molecular Structure & Bonding . ..

1."List the following compounds in order of increasing ionic bond character: Csl, I2, CsF,_and.

N F3. : .

A; 12<CsI<NF3"<CsF 12<NF 3<CsI<CsF - .-

< Csl <.I2 _./CsF-<NF 3 . csF<CsI<NF 3<I 2E. 12 < CsI'_; CsF < NF 3 _.Vb -' '

.g

2..I6 whicli of the following molecules dales the underlined atom violate the octet rule? ._ _ _ ..

.. .. 0_ -.:@ ."0=..ta .;o,,. .1. CIF3 .,,: "

• . _. ,_,. • ._,__.. 1-1307 -, _..,.x _o2- '_-• ,•z)•; -b"., -,. .- ¢t @ ""

.

.... /- @.land2. /Be. 1,2, and4 3and5 /_ 3,4;and5 .l;2,4and5.,

. ' at is the formal charge on the c)rbon atom in the correct Lewis structure of CN-?

A..0. - i3. .1 @+2"'" . DI-i E.-2 .; :

The electron'domain geometry oflCl 4- is _ G_

(_i tetrahedral IBm.see-saw C. square planar _ 72,,1square pyramidal E"_. octahedral , (_11

5. How many resonance structures (resonance contributors) (nay be drawn for the moleculeCH3NO2? Assume that there is a C - N bond in this structure.

©A..O B. 1 2 D. 3 E. 4

Which of the f011owi pairsof molecules and.molecular geometries (shapes) are correct?

(_ OF2, bent . _:.;..f c .- '" " t_ .

k,-k 1"_'_ ":'k'k' _) SF4'tet?ahedral.. -'_'' _l[.: _'. "2,_-. ,-, • '3 3. BrClh, trigonal bipyiariaidal " " :-_'¢D"_,c " _':_. . . k", . ._ _)BeBr2,1inear --. . °, . ..

, -5_. NH3, trigonal planar _...,_ _

and 5 • 1 and 4 . " i C-. 2,.4 and 5

- . D. 2.3,4and5 • (_)'1,2, 3,4 and 5 "

A/w• " hich of the following molecules wili l_ive the smallest bond/ angle? : ' f [_"_ 0...-..: " ...

• . _._

A. H20 13. CCI4 C. BF 3 @ NH3, E. SiCI4 "2,0• Z

2-

P/_ge1, vl

_%

Whi ing ' //; 'E° " _ch of the follow molecules are polar? " . _" _ • .

• 013 - ','" '" ' .... 7,,z "- "v,_"_ / .'. "_" • "-.' . :..." .- .:. % ,Z'co 3:

../ '. , -." , _ f-_ : ". ,land4 ." ' " B. li2,and4' ' . {/@l,and5" . " : :. '

"(_ 1,2, and5 " fl,2,3,4, and5.. " -'tL-'/' "" .¢- @• "" . . f

" " 9 " " - "°'/_ "\9. Which set of.hybrid orbitals is fised by.the centrai atom of ,the'molecule BrF3 . \ fdfll01 ¢ , •

. - f_ /A. sp .B..sp 2 .C. sp3 " _ sp3d E. sp3d2.,

10. How m_y sigma and'pi bonds are there in the-linear (straight chain) molecule butene " - " ' ...

C4H8 ? -- _ a _, a . .

" V _0-:., L'_":C_L, _._,:- " . ._.....

" @A. 13 sigma,-0 pl B. 12 sigma, 2 pi " 1_2sigma, 1 pi - "

• " . . . D. llsigma 2'pi- OH'sigma, lpi . "

.. Unit 6 - Properties of Gases - -- '-

2 Consider thefollowing reaction ,_ " . "p

CS2(g ) + 3 O2(g ) ---' CO2(g ) - 2 SO2(g)

lfthe volumes of all products and reactants are measured at 75°C and 1 arm, what is the

t(}tal.;¢olume of products if 3 00L of each reactant areused?

0 L _.:4; L Q_) " :0 4.50 L - D. 5.00L E. 3.00LA Q _

_D

j.. i e f '- Wha't s tlae volum of 20:0 g o oxygen gas at.-77°C and 0.680 atm?

A. 29.6 L. (B.) 22:4 L C. 5.28 L D."/4.8 L " " E. 26.4 L

V A gas vessel'is attached to an ripenend m'anometer filled with a nonvolatile liquid of -

/_ / density 0.993 g/mi_ The height of'the liquid in the side of the manometer exposed to the.enclosed gas.is 32.3 cm lower than the side exposed to anatmospheric pressure o£765 torr.Given that the density of mercury is 13.6 g/mL, the )ressure of the enclosed gas is --

• • - arm. - _ -.,\

- r (C_ "A. 1.0.4 . B. 1.01 - 0.976 .D 0.993- ' E. 1.08

Z The atmosplaeric pressure .at the top of ski hill was.675 Ton'. What is this pressure in kPa? - ::_.A. ll4kPa (B._0.88.81_Pa C. 90.0kPa D. 1.13kPa-- .E: 101kPa

_.. _Vhat mass &sulfur dioxide will exert:the same pi'essure as 75.0 mgofcarbon dioxide in the

/_ / same container under the same conditions?A. "109mg :B.36)lmg C. 75.0rag . Q_ l:.70mg E:' 51.5mg . .

/ ,-16" "A gas mi:_ture contains 0.0500 moles of hydrogen 0.0400 moles of carbon dioxide, and/ 00325 moles'of nitrogen in a 2 00 Lflask If the total pressure in the flask is 1000.Tort

what .is the'partial pressui'e of hydrogen? _.

,g,. 0.161'arm - B. 0.0658 aitm.: 0.408 atm" .D. 0.269 atm E. 0.537 atmk23

• Page 2; v l

• , '(o.

/

/ A g/assa/nple has a volume bf 12.4-L at 650 Torr: If the temperature is constant, what• volume does the gas have at 3.2 atm)

_Z_ A, 4.5L .B. 3.3i_ C. 26k _ C_46L. .. E..0.30L "V

,Z ' -An unknown sample of a gas hfis a density of 1.10 g/L at 91.0 kPa and 25°C: .Which of the" following is the gas? "

_-_ A. butane, C4H10 B. SO3 . __.I.SF6D. ethane, C2H 6 - E. Xe . : ;

.

19. In air at 25°C, which gas has the lowest average speed? _ "

A. CO(g) B. NO(g) O SO3(g) D. CO_)(g) E[ Ne(g)

The time required for 0.010 moles of SO3(g) to effuse through an opening was 22 S. Under . . .

- the same conditions, an unkno_vn gas required 28 s. The unknown gas is

A. Xe(g) (B_. UF6(g) . C. 'SiF4(g) D. CF4(g ) "- E..SF'6(g ) '-2

- Unit 7 - Properties of Liquids,Solids, & Solutions . -

21 Which of the following statements is_? : ._r_0 = _"¢_, _'_ '(_, 5_,'s I '_ (_/,

• .. • 6.:',6, 6 t...GSublimati°nis an exothermic process, v ". " ?. , " -

..7, It takes more energy to break a c_Jvalentor an ionic bon_lthan it does to melt a solid or ,•evaporate a liquid..

C. The strength of the intermoleculai" forces that exist between molecules of a pure - .substance will affect the physical properties of that substance,

_E_AS the temperature.of a gas increases, the kinetic energy, increases.• Changes in pressure d o not significantly affect intermolecular atffactive forces for solids:

22 Whicliofthe following molecules are incorrectl_ paired Witfithe predominantintermolecular force experienced betweeia molecules of the pure substar_ce?

- , , . ,

._ ,v \@ 1."CO2: 'dipole-dipole "' ": : ".O._'{'fO-:. '.'v_r42-"k0 _. Br2: . _London dispersion forces \'_¥-_ _:_ 1.. 3(_." ..-¢ 6

•. 1 " '-:. ,2(, H202i hydrogen bonding gh - _3_ '0, ". _':' 7.._.cc_ _5-

PI ./d'(', PH3: dip61e-dipole ; "5. CH2F2! London dispersi6n forces' _ "__'_'_ ?,_r5 _g_

/ land2 _. 3and4 0 land5 _ 3,4and5 [ I 3,.hnd4.IrA, ' I

23. Which of.the following statements isfalse? . . "l/b ' (A ¢ O- _ | _ t' _A. COl4 has a greater polarizability than CH4, - - - -37- _ 1,t_AI 14• , - . _ • o -

,,_ Londondlspersion forces are the weakest of the mtermolecular forces• . • "._ The viscosity of a liquid generally increases with decreasing (emperature. •

[_13.)In separate 1,0 L containers at the same temperature, H20 has a higher vapor pressure"_" _than Ne once _iclyhamic equilibrium has been established. • ' - g'

-.. SStrong intermolecular forces yield h!gh surface,tensions f0r,!iquids. '

24, A metal crystallizes in a body-centered cubic unit cell Each unit cell coniains a total of

metal atoms and this _typeof unit cell has a coordination number of .-

/2,6 0 2,8 .:. C. 4,8 t_. 4/12, _ 10,12IT• . , • - ° ¢

25. Whichof the following cor_rect&,liairs the substance with.,the type of inolecular so!id - : " -formed? ....

" " - _ Au: "" metal crvstal -" " " " : •NiO: ionic crystal-'-- " " - -

3. C: Covalentcrystal-" " : • .Q_) .H20:'- molecular crystal

A. land2, nd4 3an 4. D. 1.2. and3 1.2.3.and4-7

",_'/ S An iomc crystal unit cell"iscomposed of two ions, X and Y:.The empirical formula of this (,._ ta,i I-,-_:, solid, is XY'}. If the X ions occupy.theeight lattice ibnint; at the co.'rners of the unit cell and _:, 9,7_.

on all six faces/how m__nyX and Y ions, respectively] are cbntained in !he un!t cell?. ___: 12,,4"

A. 1,1 . B. 1,'2 , ,4 , . D. 4;4 E. 4;8• . . *

27. Which statement regarding the phfise diagram l_elow isfalse? .

5.0 -- "- f_ 2 _'

30"-- - ...."" "

_" 2.0 -- _! ,. , ,l "-

I I _. I -1 '1. .I25 50 ' 75 I00 "125 50

, .Temperature (*C)

SA liq . "" _ .... ;o

t 4.0 atm and 100 C, this substance is a uid

.if 4kt a constant temperiatureof-75°C, increasing the pressure from. 1.0 at/n to 2.5 atm will .: " -.' -- •cause this substance to condense. • . " . . " " ' . • • .

At a temperature_of 25°C,'sublimation.. occurs when the. pressure'is, increased from., •0.25atmto1.5atm.. . . . "'" • • ...... "" " " '

.. _. The ;triplepoint for this substance occurs at _1.8 atm and-_-45°C.. : . " " : f " i , "' ': ._..At a pressure of3.0 atm, this subsiance Will melt il:the temperature.is increased from. "" . :

ich of the statements below regardiiig solubility isf.q/_.9 ' .. " -. ..• ,. 5

/ ,,_F sta ter increases with: a;ure.:" "' :". "or most ionicsub n;e;, solubil_iy in wa inc;:ea£ingtemper '

,,,,ft. Nonpolar benzene, C6H6, will dissolve CaF2.better.than it will Br2. • " _. , .-,_C. The solubility nf a gas in a liquid is affected by ixesstire. " '.. . _.l'Ok_'(-,A"

' _,_. The solubi!!ty of a gas in water decreases with increasing temperature., • ' " - ".. " "' '

._. Water is an effective/solvent used to dissolve many polar compounds. _ ' ... .

, . . , . , . _ :.._ "v_ -.29. Which of the following arespectator ions in the reaction of aqueous solutions ofNit3r 2 arid " - ,,

'., z'_'-':,"lxla'c'n'9'.- - . . , . . . ' ..

• /Na+andNi 2+. /Br 2andCO32-''' ._. Ni2+andCO32- • " " "

Na and Br- " E.Na +and CO32- • " .

30. Which of the following statements isf_.qL_.? • ' • "

("_Most molecular compoundsare'electrol_,tes. " . :'.:, .-- ".i_ _ .'t

,,_. Strong electrolytes are solu!es.thatcbnsist predominantly of ions once dissolved in - . ,• water." _ . • , - . . " , . -J_. Highl3; solulSle'compounds are not necessarily strong electrolytes.. ', " : " ':."

,_D( Solutions of Weak electrolytes consist of,both ions and molecules but with ag/eater: -,,proportion of molecules.. . , : " '- : - ' . '

E. HNO 3, H2so 4, NaOH'and Ca'(0H)2 are strongelectrolytes. .. ": . ."

Page 4, vl ' . - -•. --

2

._Unit 8 "-"Organic Chemistry _

._ ./31 : Wh ch of the following is optically active (chiral)? c4_ c. _ca -"" " :' C.,_ C - C; -• _ i_l - '_ " . • " ' - ,I" _ " " •

IJ--b,J",hi _ A. HN(CH3) 2 . (_ CH2C12 j/'" :.. 12-chloropropane .n \;_ .- , • . ,,---/ . . • ,. I , -. . . , _-_ ,..'i";' • _- D, 2-chlor0butane , •".,L_'.3-chlordpentane....." , "4 " " _2. 77..-". -.__-- -,____ • - I ." "" c-c=,c-__-_- _. _,- _;_'.

ene i_" (_ 1,2-dibromoetheneC=6.6. c. . . , ,._./_v- t, . , . • , . , ... _ D, l,l,2-tnbromoethene .E. 1-bromo-l.chloroethene _. _ .-- • " ,

l ,,I / . " ' " " "." r_ ' " -

(_;x't..2 ,3"3. A carboxylic acid wil! react with an al.cohol to form a(n) " . and a water (.'_0 _ " "_ / molecule•

/,/_ " 2" . 2 "._/ester /_nine C. polymer"-_, ket0ne @aldehyde

34, _qaich molecule is a ketone? .... - .

0 B: CH3CH2OCH 3 _et'_v'¢"

II CH3CH2NH2 -,_ , .. \ .. ..-

_. 0 l- V ..._.-a ,\ . aa- c,-:t.,=o:--.,,--.c'-"'Vt ".. , -

I

35. Identify the functional group present in.the following orgh_ compound: -_ a- _ _rc_ _-7_o

O ----CH 2

. 32 2"_'C :-T_CH2CH3 " C_.0 _" ,q_,:_.(_

.,_. ester /aidehyde" Q_)ether - c_ _oi¢_ o_totO,.3k__/ketone E. noneofthese` " ". _..0_" . _"_""'"._ / How many isomeric alcohols have the molecular: formula C4H10 O.

%\,._ _.,,_,'1,- A. 5 B. 4 " 3 .C/ o..t°'_"r_v" D_"2 .... E. some other number,

_' ' A student gave a m°lecule the f°llowing *name: S_

2-ethyli3-methyl-5-isopropylhexane --,- c_Og

However, his TA pointed out that, although the molecule could be co/'recq_ drawn fromthis name, the name violates the systematic rules_ What is the correct (systematic).name ofthe molecule?"

/3,4-dime!hyl-6-isopropylheptane _.B.,2-isopropyl-4,5-dimethylheptane -."

" (3. 3,4,6,7-tetramethvloctane - " @ 1,2-'dietl_ylC3,6,7"-irimethylheptaneE. 2,3,5,6-ietramethyloctane

,,. .-

L, C-?'.C-C-C-,.6--c-c;c. _5. -C._C_C'-C-C_C_C

6%c% . c% ca3 .. '- " ..

. , , L. t I

_. c--c-C- C--C-(..-C.-G D- (...-c- c-b-:c-c--Ci I I I . -6_3 6_--5 61,t.3 6113 _ I

: "Page 5, vl t_a. £._a.

ff

38 Referring to the accompanying structures, determine which of the,_'ollowingstatements isTRUE., " " " " -- ': -

• , .---Ci C.2OH, -• • . O "

2. HOCH2CH_-_OH _'_ _ _) _ (-'"_ "" • " "."

• O " • , . . -,

3. HOCH_CH2---'O;-_''_ " _-_ O_ (_

_.1 and 2 have different molecular fom_ulas. •z

_. 1 and'3 are isomers of each other. - _ "

_.1,2, and 3 are all isomers of each _ther.J ,-• .

_.2 and 3 have different empiricaFlbrmulas, . • ' -: - ,

_"_, Q_) l and 3 are the same compound " " ' "' , : . :-.' The characteristic reaction of the alkynes (do notconsider their uses as fueis ) is

A. oxidation• O redliction.C. substitution. •. D." addition• :E..elimination• -• ' . " "

40 The cbrrect name for the following is _ " "

Q 2,3-dimethylpentane. .B. 2-ethyl- 3-metliyll_utane."_12_.2-methyl-3-ethylbutane. D. 1 1-dimethyl-2-ethylpr9pane.

• _'_. isoheptane. -" '/

°

7

-Page 6, vl

P,,YSICALAN°C"E.ICALCONStANtSAtomic massunil . I amu -7-1.66054 x' 10 z7 kg

6.0_2214 x 10z3amu = 1 g.

Avogadro'.s number "N = 6.022 x 10z3/mol .,'. . ." •

" Boltzmanh's constant k = 1".38x 10?23J/K

Electron rest mass me = .51486 x 10"_ainu

_. = 9.109 x 10_g

Faraday's constant -F = N e :- 9.6485 x 104C/tool '.

Gas constant " R = N'k = 8.3145 J/(Komol)

= 0.082058 Loatm/(K°mol)

Heat (calories and Joules) I cal = 4.184 J

"Neutron rest massl mn = 1.00866 amu , .

. . = 1•67495 x 10.24g " .

.pi' " , _=3.1415926_536

Planck's constant h = 6.6260755 x 10.34Jos

• . Proton rest mass mo= 1.00728 amu

= 1.67262 x 1024 g

Speed of light (vacuum) c = 3.00 x i08 m/s

z ": Volume ofa cylinde( V=hnr 2 (h = height, r = radius

ENGLISH/METRIC CONVERSIONS.and MISCELLANEOUS CONVERSIONS'

Ilb.=16oz.-453.6g 1 mile=5280fl • ' ._ . ....

•1 in. = 2.54 cm .1 kilometer = 6.214 x l0 _ mile

1 gallon = 3.785 liter 1 cal =4.184 J

RYDBERG EQUATION

)=R[':l_ l'" " 'bE=-chR 1_ -1 "tn12 h'j, - ,ur2'

R = 1'1097x 10 7 m "1 chR = 2.18 x 10"ItJ

"_""" PRESSURE

. latm=760torr=29.92in=14:71bs/in2-1.01325x105Pa __--. , ,0,02

- " Periodic Table •of the Elements .

H [ He \13 14 15 6 1 4.00' 5 6 .7 8 _ 10

2 Li I Be - . :. - B ,C , N O - F Ne6.9419.01 " 10.81]12.01 14.01 16.00 19. 20.18 . •: -- * _ . _ r

II I 12 - 13 14 15 16 I 18 _"

3 Na,IMg ; .. AI Si -P S C Ar. ,22.99]24.3( 3 . a" 5 6 7 '8 _. 9 " 0. I1" "1"2 26.98128.09 30.97 32.06 35. 39.95 . .. ,, ' -

i. i 20r 21 22 "23 I 24 25 "26 27 28 29•1 30" 31" 32 33 34 "3 36

4. K ICa Sc Ti .V Cr Mn Fe' Co Ni .Cu IZn Ga. IGe- As Se B Kr , -39.10 40;0[ _4.96 47.88 50.94]52.00 54•94 55.85 58.93 58.69 63155165.38 69.72172.59 74.92 78.96 79. 83.80

_" 38 39. 40 ,41 I 42 43 44 _45 .46 47" I 48 49 50 51 52 5_ 54 :

". 5 Rb-ISr Y. Zr" Nb IMo Tc Ru" Rh Pd Ag ICd In s.n Sb Te"l Xe'.

85.47187:62 t8.91 91.22 92.91'195.94 (98) ldl.l" 102.9 106.4 i07.91112.4 114.81118.7 121.8 127.6 i21 138_3 ,hs i 56 71 72, 73 I 74 75 76 77 78 79 I' 80 81 82 83 84 8; .

' 6 Cs IBa Lu HI" Ta'l W Re Os lr Pt Au II!g TI Pb: BJ "1)6 A RJi •132.91137.3 175.0 178:5 180.91183.8 186•2 190.2 192•2 195.1 197.01200.6 204.41207.2 209.0 1209) 121 C222)

,_7 I 88, 103 104 105 11.06 107• 1(18 109 110 111 I 112 114 . 116

j . .

7 Fr IRa Lr Rf Db [Sg" Bh Hs Mt Uun UuulUub U.uq' " Uuh '"," (223)1226.C 2'60)(261) (262)1(263) (26:'))(265) (266) (2711 i272)1/277 ) ](285) (289i " i" .....

• . f , , '. ,,t

" Lanthanides "";" : " " ', , . • ,

," .57. 58 59 60 61 . 62 63 64, 65 66 67 68, 69 70 _, , - ":-, La Ce Pr Nd Pm Sm' Eu Gd :rb Dy Ho Er Tm Yb. -:.,= 138.9 140.1 140.9 144.2 (145 i 150.4 152.0 i57._.'i58.9 162.5 164.9 167.3 168.9 173.0 ' :

89 90 91. 92 93 94 95 96 97 98 99 100..101 102Aetinides Ae Th Pa U Np 'Pu Am Cm.Bk Cf ,Es Fro. Md No

...... 227.0 232.0 231.0 238.0 237.0 (244) {243) (247) (247) i251) (252) (257) (258) (2'59) • "

(Mass numbers givenin' e pe• par ntheses represent the mass number of the most stable isoto .) .

. • DONOT ;tURN THISPA(;E UNTIL DIRECTED TO DO SO ,*

Fall 2010" Chemistry 1315 "EXAM 1 • " - .r•

_:' : Name: Lab Instructor: -Zh o.o'd-ont4 . k,I¢,.¢',_.,.)

.. IDNumber: _ . -

1. These' tes'ts are machine graded; therefox:e] be sure to use a No. 1 or 2 pencil for marking the answer sheets. ." Completely' blacken the answer circle= If you change an answer• erase completely the prevtous mark.

2. Write the letter code of your lab instructor (see.table at bottom of this page) in the first box of the section "marked "NAME".. Then in the next box (do not skip _abox), Writ+'your last name. Skip. a space and thenfill in your first name and middle initial• Example: If Joe B.Doe has Adam B_iiles, Section 54 for a lab

. , - ,< , . "

instructor, then'his answer sheet would look like: "

EXAMPLE: 1st Box T.A. code (see below) - "-

I (Latit,First M.I.) "' "" .-' "" "" ' 'l "

IA DO.EJ. OE B10.b3":: ': :: I .If your whole name does not fit, put as much as will fit. Then blacken the izorresponding !etters below each :•spaceon.the answer.sheet. • . ,..-. " ' o

3. Fill in your ID number in the space provided, beginning with space ,,,hj,. (There will be an .extra box.) :.... -Then blacken'the circles corresponding to the numbers'below.each space• • .

4. In the-"special code" section• indicate in column K the test form you have:Mark in Column K. .Test Color Answer Sheet Color Swipe 'L

I Blue " • Blue

2 " . Gold Black "

3 ,. Pink . . - Red :-i _ :4 Tan Brown

Make sure that you mark yoiar test color in column K. and !hat.the colored swipe above your name on the: answer sheet is the i;am'6as youi" test color.

:5. In_the "Special Codes" section, indicate your lecture insmactorin column P_ Please fill in the appropriate.circle. '"

Instructor Section Time D_._. •

--_ .... ,, Rocher , 001 , ,1.1:30-12:20 pm MWF

i:_ -U'_.=y¢.• -2_= . _Ab-rah_-_.__:.,. _:__002 ...#_. .9!00-10!15 am "'_ TR'' • " - .-• - - West 003 . 10:30-11:45 am ",'_, -- _-'---'---_--.-;_- _TR . " - " ].

Jones 004 • 2:30-3:20 pm .: . .• MWF,. " "_"_-'-'_-Thus if Joe Doe's lecturer isRocher. Sec. 001 and his,test i_;GOLD• his "Special Codes".'.section would be: "

• SPECIALCOD_ • . _ , . , _ . ,

" " . " " K k M ,N O P _" ' "

• - " " " 2.'. .. . .',1 r -•: 0boo® ®:®I : "'- D®®®® _01@ "

. ,DO(D (D (D_ (3_ ,,S') (7_ G'_ (@, * .'

6. The time limit on this tBst is 90 MINUTES.

7.- 'READ THE TEST CAREFULLY, , : ....• 8. .Do not thm this,page until directed to do so. • "-.... " _ .-9. " Use this bookl& for scratch paper. You may not bring your own scratch paper to_the test.

10. Mark your answers in this booklet, as well as on the answer sheet SOthat.you can check 3'0ur score withthe key after the test,

11. Each Unit Score will be calculated from the number of correct answers. There is no penalty-for guessing. - •

12. Students will be heldxesponsibie fo/" any corrections made during the test. : . - _"13. Students who' arrive more than ten minutes late, iir arrive after another student has left, will not be •. .

allowed •to take the examination. : . . : •

Code _. aF.,,x_._l__Kg..9_.m_: Code-_ E_m Room.Bailes.Adam A 54.59 DH 103 Morton.Nick N 25.22 " . NH270 .

- 'Balisb..Tori B : .44, ]7. DH 211 Nickels.Logan " - . O 40. 38 . DH200- Bamper.Dan C 46. 36 DH 128 Ntreh.Abigail " P 50.57 NI_I170

Biradar.Vidya D 24.35 DH211 Pi,Hualiang Q 15.16 . DH200Czapla,Matt E 48 I)H206 •Roberts.Jonathan R 41.18 GLCH 123

• ' Gann.Tara F 56,34 GLCH 123.• Salvi,Tia ': S 42.14 GLCH131Garrett.Justin• G 52, 29 DH 211 Sampson,Joseph , T 37;51 DH218Godman.Nick "'•H 58.47" DH 211' Thomas,Kieth - U 53,45 : DHI28• %,

Harrison.William':: t 3l. 30 NH 270 Wang,Z_aodong V 27.28.• DH 103Jozwiul_.Ann_ - " J .39• 33 , . NH 170 . , Wang,Zhiguo W 26, 32 NH270Lau.Austin . _ K ,49, 55 DH200 Xiao.Qiaobin ,:X '(2, 13 '" DH200 •-Lu. Shuo L 20:21 DH206• Zhou. Yongyao • Y 19 DH 107McClain.Mike M 43 DH 125 . .

- .. • .

°i . . •

; "J' 5' : ,,. ) , ,• •

?/ • - .

Unit I _ Basic Concepts,Atoms, Molecules, & Ions-. ,,

• • _ • .

100 seconds contain this many nanosecondsA. "1x lv 7'_B. 1 x 1010

• _ 1 x 1012 ..D..I x 108 "

'" E_ lxl011 " ,

2. One side of a cube measures 1.55 m. Calculate the ,_olume of the cube in cm 3.

A. 2.40 x' 104 , • .:.: ,, -, ,

_. 3.72 x 106 "_ * ": 2.40 . , _:_ : -. ..-D: 3.72 ..E. 155 :.

3. What is the result of the following calculaiion? Assume all of the numbe_ are based onmeasurements.._. • b

" (6730 x 10-3 + 01000201 x 105) / 2.948_.

A. 9.10108 "' • '..-B. 9.1011" G,"/30.' +. 7..o.) .-- _2"G"'°o _..5 #,7 _7..)

(_ 9.101 "Z,"1'-i_9.10" • _E. 9.1 "

4:. From left to right correctly classify eachof the following particle level representations of ' , -.imatter.

• ," . *

O © _ . ,

o o

' " ' A. compound, element, mixture, compound' • ' B. Compound, compound, element, compound - : .

_element, compound, compound, mixture "D. element mixture mixture mixtureE. element, element, compound mixture '

5..A large quantity of uranium bexafluonde weighs 8.27 x 103 tonsand occupies a volume of

1.62 x 106 L. What is the density of uranium hexafluoride in g/mL ? (1 ton = 2000 ibs) &

_. 2.10 " ll, f_Oooo I1.$ "'_

, .

.63 _ 7. 0 tylL ...32 I_ oO 'O O °OD. 4631 " • "

E. 510.•

6., How many protons;.neutrons and'electrons (in that order) are present in an atom of .60Ni2+ ?

A. 26,28,60 -,B. 60, 28, 32 "C. 28,32,28 i,rd_,L._- • • (.OO

&6O, 6O,6O ' , _.28, 32, 26 . e.,,,4,L,,__ '2, ..

: -" Page 1, vl .

7. Which of the"following°is _ named?

A. Pb(CN) 2, lead (II) cyanideB. NH4C104, arnommumperchlorate

• C. PO43-, phosphate ion --_'t{,,,qt.f0..., /'?z,t_.

D. Mg(OH)2, magnesium hydroxide /_Jl,offo,_ [Pc,d-of)

O SO42-' sulfite ion g__,__ /te._c_O

8. -What is the correct formula for iron (111)nitrate? . . t,¢q,']I/ge-, ,Mt. >i .o Z _ t<.t.._ "_

_- A. Fe(NO2) 3

B. F_N O3_ ...

_'_. Fe(NO3)3. FeNO2E. Fe3NO 3

.¢J. J. Thomson's experiments with cathode ray tubes enabled/ ,_A_.gthe calculation of the cfiarge on an electron • "

t.% 2::,> . - J•B. the thscovery of the neutron

..._the discovery of light . " -CD_)."the calculation of the charge-to-mass ratio for an electron

. -_.; the calculation of the mass of a proton

10. Which statement is correct about the set of.elements:.Sodium, Fluorine and Neon

A. All three are non-metalsB. All tbxee exist as diatomic molecules

' .,_ Neon is in group 5A on the periodic table1 is a Noble gas, 1 is a halogen & 1 is an alkali metalAll three are metals

Unit 2 - Stoiehiometery

I l/The atomic mass of brormne is 79.9. The isotopes 79Br and.81Br exist m nature re.the ,.. :- .. , .--_-_-_.-----__

apprommate ratio:j_, not enougli data to estimate _ ' .<5_ ('_fi) + ._._(_1) = 1,3D• ' "_..5 % bromine-79 / 95% bromine-81 -f¢)..'t

30 % bromine-79 / 70% bromine-81 ,--"7c/.._ _55 % bi-omine-79/45% bromine-81 /..oo .,1_5

_3. 70 % bromine-79 / 30% bromine-81 "r__A.a

12._A 9.5 x 102 mg sample 6f ._N_93) 2 is needed for a reaciion. How many nitrogen atoms/t does it contain? - _-2 . " _ - "I . /-1_0 _5 i t,.,0 • . . "_ -_ctoo9 | ] )_._1_(l%)a.

". " "5"_"0"061x 1020 ' _i . .cT.va'w 3n7.. _ 7_[ _ _.._._./, 0 5c°r'_'_'_J_'lxl021 "_'_'3 " "" - t_a'H " / ,'",/.kUa., k,.,I-/_"_,5-_o¢ _''gVV _/7-

• "-_.6 1 x 1029 • • i_-."1_ o'1 )_ _ .. . - . 7.1_. . -4 , ., 2 '. " z._ . •

D. 0.031xl0 3 4e. ] (_,tJvz. g/o .5"72.0'7 GL.3 . " - .-, 1o0../(I

" V,/ _'/E-[")3"Ix 1021 ", .------_.._.,.,n[ ' • -- . ' . . ,, oO.re,,_lC,40°_)'_ _._'N._

,,,E .iene+c;1t.esub.t.n;eL,2omobilean freeze:iscom.o o <• J bg " ' '

H, and 51.6%.O by mass. Its molar mass is 62.1 g/mol. What is the molecular formula of .• this hydrocarbon? . ' ' "' .. . " '

A. CH30 ' •/003 . _2 .2_,o3.;.._.)a-t. I4 "

._. CH20 _2'15/m',t )4 6,,02 ;{_,u2 !

'----"_- _ 3 z.o _1 ,t,.o_ ( ;/_ _\C. C2H40 2 I r_ol

"' /_C2H60 : " <D 5 '.

_'i_C2H 602 : _(_) =.2,O_5 . . , :. _. z'7?)'g;7_,'/__'/$-3,-zT.x:- Ii i(,...,,,i k.2"_,_ 3 .... / /,.c o/ N_zq,

H ,..),t3 .--.-zN,'7 z _' Page2, vl.. . .,.00<_,<X2_',,_1/,(,,.o_2_./O .'=_/3 t" te_

4 _

o" s-l,u3 ---Y,z<_s'-- l

4 , -

14. Which bfthe following compounds has the.same "percentcomposil!ion by mass as styrene, "C8H8? =lOLl . •

cryq02 a e lene C2H 2 ' '.B. benzene, C6H 6 : : -...:C. cyclobutadiene, C4H4 " • • '

D.. a - eihyl naphthalene, C12H12 v

(_all of the above "

15. •Balance the following equation with the smallest whole number coefficients. Select theanswer that is the sum of the coefficients in the b_lanced eqtlation.

.- 2.Co203(s) +3C(s) _,_Co(s) +3CO2(g)

A. 5 " Co _9.._ _.o _B. 24,.

l0 o _A_ : o _

E. 6 C /1"3 C 3" 3 ,.

'7 1_ Equal masses (in grams) of hydrogen gas and oxygen g_isare reacted to forrff watei'. Which

I/ substance is limiting the reaction? t ' o ._.A_n_a'_Oxyge is limiting '. . _z (-_/'4"t-CZ)° "> P_.. l ..Zo33. Hydrogen is limiting - - "-'-_ ."_ _:_ '"'- -:.C. Water is limiting . ! "'D. Nothing is limiting.

(.E.) More information is needed to answer this question

17. How many grams of nitric acid can b_ prepared from the reaction of 69.0 grams of nitrogendioxide with 36 grams of water? _t,_[_,,_ . . "

3NO 2 + H20 4. 2HNO 3 + NO

_252 g . m _qD 5G_ • 9 .c,.

63.0g c " " 2"_.).

E. 76.0 g " " -"-T_ -.--

"7 18(Suppose 600. g of Pa reacts with 1300. g of S8. How many grams of P4 S 10'is produced if

the'yield is 80.0%? 4P 4 +5S 8 _ 4P4SI0

_:,-- 4.62 x 102 g i uoo_ _,r_ - ?B. 1.44 x 103 g

_)2.16 x 103 g _-D. 4.92 x 103 g I:E. 6.50x102g

19. What mass of CaCI 2 must be dissolved in enough water to produce 2000. n_ of 1.25 MCaCI2?

174 g ,.,-_._' _/ff'B_ 277 g /_ _"_--_--'- /"'90.7 g /_.... r-'""_ Z__ "

,----E. 310 g (_x-_'3 _,ol (,"-_'_"_" J_ .lI, 215- _.-_

• c _ 116 × zz'r5/.LS; - _-

_ -'_, l.-

-z, ?.__l I/if,)=. . , -

_b..s- _ llt> -----u-z _- " Z,,_ --I/Ox• 6"2.z -7

.Page 3, v 1

(t20_ What are the respective concentrations (M) of Na* and :_u42- obtained by dissolving 0.500

_ _fff mol o_Na2SO 4 in water and bring to a total volume of 1;33 L? " . r_ _,--5i.. }'_ _- _

A. 0.665 and 0.665 " L_B.. 0.665 and 1.33 - .

(_01.33 and 0.665.376 and 0.752

._.752 and 0.376 ]_:/z,_ ",4,/Jo,2_. /vl ; /,_3 L.

,, o1'¢'_

"," . ,}\,] .. .Sqq_l_ - 1

_ , "4

C

1

Page 4. v 1