TEST 1

Name________________________________________________

1) In the opening scenes of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces the idol with a bag of sand of approximately equal volume. (Density of gold = 19.32 g/cm3; density of sand 3 g/cm3.) {from Zumdahl, Chemistry, Saunders (1994)}.a. Did he have a reasonable chance of not activating the mass-sensitive booby trap?

(assume the bag and idol have a volume of 1.0L, and use NUMBERS to justify the answer)

Gold is over 6 times as dense as sand. The bag would only weigh 1/6th the weight of the idol.

b. In a later scene he and an unscrupulous guide play catch with the idol. Assume that the volume of the idol is about 1.0 L. If it were solid gold, what mass would the idol have? Is playing catch with it plausible?

It’s hard to play catch with a 43 pound ball.

2) Solve the following problems and express the results with the correct number of significant figures.

a. 3.894 x 2.16 = 8.41

b. 2.96 + 8.1 + 5.0214 = 16

c. 2.17 * (4.32 + 401.278) + 21.826 =

2.17 * (405) + 21.826

879 + 21.826=903

d. 485 ÷ 9.231= 52.5

e. 2.46 x 2 = 5

3) At the 2009 Olympic Games, Michael Phelps set the world record for the 200 meter free style with a time of (app) 1minute 43 seconds.

a. What is the speed in m/s?

b. What is the speed in km/h?

c. What is the speed in ft/s?

d. What is the speed in mi/h?

4) A sample of gold is comprised of 60% 197Au, 15% 196Au, 10% 198Au, and 5% 199Au. Find the atomic weight of the sample.

Weight Fraction Atomic Mass Partial Mass0.60 197 118.200.15 196 29.400.20 198 39.600.05 199 9.951.00 TOTALS 197.15

5) Complete the chart. Atoms are electrically neutral.

Symbol Mg 56Fe Tc At H Pa Lr 281Ds Nd 108Ag

Protons 12 26 43 85 1 91 103 110 60 47

Electrons 12 26 43 85 1 91 103 110 60 47

Neutrons 12 30 55 124 2 140 159 171 84 61

Atomic Weight

24 56 98 209 3 231 262 281 144 108

i

i 1IA

Electronegativity ValuesCourtesy of

Dr. Fred. GarcesMiramar College, 2007fgarces@sdccd.edu18

VIIIA11H

1.007972

IIA13IIIA14IVA15VA16VIA17

VIIA2He

4.002623Li

6.9394

Be9.01225

B10.8116

C12.01127

N14.00678

O15.99949

F18.998410

Ne20.179311

Na22.989812

Mg24.305

3IIIB4

IVB5

VB6

VIB7

VIIB89

VIIIB1011IB12

IIB13Al

26.981514Si

28.08615P

30.973816S

32.06417Cl

35.45318Ar

39.948419K

39.10220Ca

40.0821Sc

44.95622Ti

47.9023V

50.94224Cr

51.99625Mn

54.938026Fe

55.84727Co

58.933228Ni

58.7129Cu

63.5430Zn

65.3731Ga

65.3732Ge

72.5933As

74.921634Se

78.9635Br

79.90936Kr

83.80537Rb

85.4738Sr

87.6239Y

88.90540Zr

91.2241Nb

92.90642Mo

95.9443Tc

[99]44Ru

101.0745Rh

102.90546Pd

106.447Ag

107.87048Cd

112.4049In

114.8250Sn

118.6951Sb

121.7552Te

127.6053I

126.90454Xe

131.30655Cs

132.90556Ba

137.3471*Lu

174.96772Hf

178.4973Ta

180.94874W

183.8575Re

186.276Os

190.277Ir

192.278Pt

195.0979Au

197.080Hg

200.5981Tl

204.3782Pb

207.1983Bi

208.98084Po

[210]85At

[210]86Rn

[222]787Fr

[223.02]88Ra

[226.03]103‡Lr

[260]104Rf

[261.11]105Db

[262.11]106Sg

[266.12]107Bh

[264.12]108Hs

[269.13]109Mt

[268.14]110Ds

[271]111Rg

[272]112

[277]

114

[289]116

[292]* Lanthanide

Series57La

138.9158Ce

140.11559Pr

140.907760Nd

144.2461Pm

(145)62Sm

150.36863Eu

151.96564Gd

157.2565Tb

158.925466Dy

162.5067Ho

164.930368Er

167.2669Tm

168.934270Yb

173.04‡

ActinideSeries89

Ac[227.03]90

Th232.038191

Pa231.035992

U238.028993

Np237.04894

Pu[244]95Am

[260]96Cm

[247]97Bk

[247]98Cf

[251]99Es

[252]100Fm

[257]101Md

[258]102No[259]