qrnJo{,r: I rvr"L =z3

G.o2xrcaah$n! <hnafr

p"fu4a: *dndp - awlattr''

\ Lo/'?qr't - -V. tenL< I

period- <ot'\fa'to\Unit I Study Guide Name

2. What information is to calculate the percent composition ofa compound?a. the weight ofthe

and its molar volle to be analyzed d. the weight ofthe sample to be analyzed

lium aloms are there in | .2824 helium aloms? {d. 20.0 mol 1.2)/O

'Hc

e. 7.2847 mol

and its densitv

L]l) the tormula or-lhe compound and meatomrc mass oI eacn element

1. How many moles ofa. 0.50 mol

@ 2.0 molc. 4.0 mol

3. What is the numbera. 0.237 molb. 0,605 mol

<O 1.65 mol

4, What is the approxim^. 969b. 1309c, 2329

5. How many moles of^, |.3E-2b. l,3E-r

@tont6. What is the percent

a, 1'7.'|ohb. 36.5%c. 52.'7oA

7. How many moleculesa. 3A9E-24b. 1.26E24c . 2 . 8 6 8 2 4

8. 'rvhich of the followa. COz and SOz

b. the density ofthe pouno anoAvogodro's

c. the formula ofd€nsity

mores orBa(No3)2 in 432grams? {g1g 8q (00J.1 I /t o / 4qftioJ:d. 3.66 mol -

e 1l3 mor l2'ot'ust 6t('uc/i)e

atoms are in 4.8F25aroms of rungsren? 'l' t Yot)J*t), l

?.tri, , -d. E.oh2 lh'u\x'(J"'ev't5

- / o1. E7, x . a v

/G j .38

(E) C7Hr4 and CroHroc. CrHroand CtoH.l

compounds have the same empirical formula?d CeHrz and CaH,'e. H:O and HzOz

SHORT AN5WER . SHOW AI.L OF WORX TO EARN FUII MEDTT - USE DII/IENSIONAL ANALY$S - 5 POINTS E,4CH

9. How many grams of2 \

l < < v / o

4 n [tu o.r,)of silver in silver n-itrate?

compound and the

molar mass ofAuCl3 ?(D :o:e

e. 6269

@ etsv"e. 78.2o/o

in 2.l0 mol CO)?d . 3 . 1 9 E 2 5e. 5.99826

would there be ifthe sample contained 1 55E23 copper atoms

l m o ( C u G

A qAt llo.l

Q . t d r c l ,ftd Lea.4 ll

o5o ^G,o>x/o"t a,, ̂ he t p s l G

{ r.luono +fbr, $aN,"a

'R

,*212. Balance the'equation

j lrgctz +}<.:poo -+'F3N b lst

10. How many TOTALcredit. A6

11. Balance the equati

aqueous calcium

13. Balance the equation

Q cuu'o+For:

I4. Balance tle equation

,q,srOr(s) &a(

15, Write and balancoform iron metal and

Fe 203 r')

16. Write and balancegas to form nitrogen

2 N<l ,r1

Write and balance17.

Cq c") +

18. Wriie and balanceform iron(I[) oxide

are present in 265 grams ofcoppe(I) oxide. Shorv factor label to receive full

c,o I t , lni t tuO I a.oJyrdd Fc I , qlvhr7?. tS*g 0,0 | t nu I CcO I I Fu c.d

oftrnu4lo,st

^h\ l - rB \ 7 e1 1 l Gt- l if tz

s x, 5 2

/2 't

, l l

6 r-,Ot ->

? o , )

r{#cl, t t a A

(L3

(.. r (k7 . /

++o

+ { ?

l.\ll+ |l o l

ttty

#t ,

{c

a< -(,-+ ca31tsoo1ys1$12o61

equation showing the reaction between iron(III) oxide and carbon monoxide todioxide.

+ 3 C O 6 O ? 2 F . c s ) + 3 C o r Q

equation showing the rcaction between nihogen monoxide gas and hydrogenand waler vapor.

I e h (d -) l\J' Q) + t l])Oc)

equation showing the reaction between calcium metal and water to folmrxide and hydrogen gas.

equation showing the reaction befween ircn@) oxide and carbon rnonoxide tocarbon dioxide.

a UO (?) --) Ca fn#)1ar; t l-Jr (g)

Fn., O. + Coe) --, AR O G) + COr 6;

19. Write and balanceto fofm aqueous

Cu (s) |

20. Write and balanceto form sulfur diox

2 t*rSo>

21. Balance the equation

BaCl2@Q + H2SOa(

22. Balance the equation

Pb(Norrfad + K,

23. Balance the equation

CNHa)Cr2O7(t + N

24. Balance the equationiodide. n n I

a( Hl rs)

25. Balance the equationand hydrogen gas.

26. Balance the equation

Mf-..N2/I')tho(t)

27. Balance the equation

a AeNg,bd + cact2

28. Balaflce the equation

cacq,,Xclaq)

29. Balance the equation

PBrrfs/:3l,od) --' 3Pqbd$rBdaq)

@+rzo@+ctzq6)

the reaction ofaluminum metal with solid iodine to form solid aluminum

equation showing the reaction between copper metal and aqueous sulfuric acidsulfate, sulfur dioxide gas, and water.

f\, SOy ez) -> C' Soy (i{) -i SOrq; r atLopl

equation showing the reaction between gaseous hydrogen sulfide and oxygengas and water vapor.

+ 3 Oa r.; -) ? So, o, + l- t!o.r)

+Baso4(il*sbq)

a@d -)Pbctoa@ Nqiaq)

* 3 -!-A (5: --) , Al -T.7 (.)

the reaction ofpotassium meta.l with wat€I to form potassium hydroxide

l(cr + [sO6., _; I Ko$r.2t + idg;

ror $reronrrrrt

-+)cct6) + ca}to)z@a)

HzO(l) + CO\G) + Caclz(aq)

30. Balance the equation

Nazo(s) + Wo(l) ) aOH(aq)

31) Whot's the em29.O%

2i.o 3 o

6ss5 C S.sg H-rmulo of o molecule coglq(iing 65.5% corbon.;{7. hydrogen, ondbs .j n-€.- BJ q Q2 { *)' ntLes Q!2 +ta<l rd1. o

c: 65sdi]*+**_r r { - u . J r

,r' s.ss'*lf#rt, .

=3 ca f13 O5.75^ol C,

{S rnol Fi

slt€I . 6 t

s.vr/ , E L

t .6 ) ̂/ . 8 t

- ?

IaO) 2 i qo l / , / t 0o l o -_ r ro.oo5 o

/ . t i ' r l o

32) If ihe molormoleculor formulc?

l lcsglmolSs.os3/

- ' t! ' ^

33)Whor's the empi

tol

, / . 3 a J C

/ 1 . ^" !24t)J,-!s-=<.oaI /GrNJ I

34) If the nolormoleculor fo

7s.E1/J .6 't

rs of lhe compound in problem 1 is 110 grqhs,hole, whqt's ihe ,It* {nrl'/no[aLl ynasr rf wp,t,,"! &tril.J< ., Ci lJO

5s.osjrd

t 8.),7 u {e. 3teical formulo of o molecule con'toining 18.77. lithium, 16.3% corbon, ond? l) css.,rq C00 q a) F,noL mol": l) f=J tc!'a s

L;: 6s*Ot ? . 11 \ I , , o t 4-----f-.:-::_-- \ d, b

I 6 .713 u Lr^CO,d 6,1 _l'7:t; 2 /'

/ . t b ^ /t . 3 e

q .ob - ? .--+r . 3 p

r-;

I O

;s of ihe compound in problem 3 is 73.8 grorns/hole, whot's thelor I) An<l n!.laf ,ha65 4 LI)COJ : 23. A? qkUl

.'. ttorleelar Srr'rr"vt ar.'</dorvr.rukt, ote *he sqfie

,tl cq!

35) Calculate the 2

otnnoniu|n sulfileN [r* 5ost'

(ru ttilrsq:snus[a,f'rt't5s:

2 M = 2a.oe5? ( f = N 'o t ' 9 3I 5 : 3 ? ' o G J

3 l '< l t " X /ool l 6 , L \ I

48,OO

{/b , t,lp /0o

L rrr L C..

G.<st utoB C,, alorttJ

conposition of all elenents in the following Shov all yorkl

%N 2{.L1 Qr 'oo/ , ,o" ,1)x,uo

%H 6,1fi 33jfr-x rco --

% S t t , , u

%o4L3331; =- XP.cl<)3

tc:ni-35) Find the num

3 .75x ro

of moles of Cu in 3.75 x 1025 oloms of Cu.

G).3 rwl c"

37) Find ihe hum

f, 13 rn"t

of M9 atoms in 4.23 moles of Mg.

\o, w

l.ir0r

trn.\ fU

38) How mcny s are in 2.06 mol ol HzOz?

l.Oa rrna { Ur() 6,027 \

*l*Iar'{ [02

39) How mony are in7.32 mol of CeHnO?

A.OLyaa^nt",b

tnoleuk

7- O), nol c, lJ,t0/,u / Cs,H6O6 lutle,.'lt CoNt"0a

=lG)I rctxp IL4wJ

3.0t!02LDhzJ, ,bS0

6.o l ro . nile",l Jut

6. srnyzo"I"ubof^- \

/l4) How mony mol ol H2SOaorein 3.01 x 1023 molacules of H25O4?

l1"S 0rT M d L

ms ore in 5.15 mol of Be(OH)2?

(6P) ll eozyaa Fr.tpe tott), )od\rltts Ol . nn ot B g{O&) 1 t Eo. Blgd:

40) How mony O

g. l5 nto i B

41) How mony ct ore in 3.41 mol of AllSOr):2

6-aoz.r{r^i",w

L I qlbtu)

I Fu al6q\;.,'tyAt ru *t!g)na L lttrQtlr),

4l*o( At: {So'

42) How many oto of 5 are in 3.41 mol of Alz(SOi3?

?91 *"t ftL>&o ( L!.zobr:u l+l - 66, { g.,\,r rr,r,->

t &{ r_ { sov)_rr IFU f l IL

43) How mony nrol of N2O5 ore in 8.56 x 1025 molecules of N2O5?

lir.aL Lros-.-dJ|Ivoo ^ole*lo lv2os

' Fr*r n'nrB

I

O. \(D Il,&)/

4p SOY

6.16xto d,A

45) How mony O sre in 6.78 molbf NoNOg?

6-zf nno | ru (". O )' f UO zlr=u

r"ru1'rro r 30 o,Fu,tl I.lzY'ot *r t rrusf!6a

46) l.low mony H ms ora in 4.2! mol of CpHzzOtl

4. )'I,nL Qrlt'r. Oq I e.o.ta

/9_@l- Q.,2tlaoqt uoL Lt{:r.O,/

47) How mony ot of Fe qra f ound in7,t8 mole ol FezOe?

t Fir AJc/\rg)

2Zqi"ru f+lhned,e-Cr rllee r

-Z tg wL FI(5J\ 6.0

otfr, ttr93 I aaI /rOO L C-{ 03 I FU Q:O-I

48) How mory moes of Hzo ore there if youhov,a7,78 x 1026 molecules of Hzo?

-7.78 . , r 5 , r r / nv/o y'aD&:nl tbu

.otut|ato[ecele- LlaD

lsSvo?sabu il

< )

q-fv*s