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Elmhurst College Chemistry Exam II Name______________________
Date _______________________
Tally Sheet
Page Problem # Points Sum Actual
2 1-8
3 9-16
4 17, 18
5 19- 27
6 (28), 29- 31
7 32 358 36 40
9 - 10 AdditionalMaterials
1
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Elmhurst College Chemistry Exam II Name______________________
Date _______________________
.
1)
2
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All ofthefollowing arebasesexcept
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1)
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_______A)
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HNO3.
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B)
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KOH.
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C)
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Phosphoricacid isaddedtomanypopularbeverag
es togivethem atartflavor.
Theformulaofphosphoricacid is
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2) ______ _A)
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H3PO4.
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B)
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HPO4.
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C)
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D) H 4
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Whenaddedtowater,whichone ofthefollowin
g wouldproduceanacid?
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3) ______ _A)
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Na
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B)
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C)
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NH3
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D) M gO
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In thebalancedchemicalreactionfor theneutrali
zationofcalciumhydroxide withnitricacid,HNO3,
thecoefficient ofnitricacid is
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4) ______ _A)
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1.
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B)
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2.
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C)
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3.
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D) 4 .
(Show
yourwork forfull
credit)
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Whichof thefollowing is thecorrectbalancedequatio
n fortheneutralizationofbariumhydroxide withsulfuricacid?
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5) ______ _A)
BaOH
2
+
H2SO
4BaSO
4+
H2O
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Ba(OH)2 + 2 H2SO4 Ba(SO4)2 + 2 H2O
6)
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What isproduced in anacid-baseneutralizationreaction
?
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6) ______ _A)
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a base
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B) an acid
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a salt andwater
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D) an acid and water
7)
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The pHof asampleofwaterfrom ariver is6.0. A
sampleofeffluentfrom afoodprocessingplanthas apH of4.0.
Theconcent
rationofhydronium ionin theeffluentis
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7) ______ _A)
fourtim
es(4x)large
rtha
ntheriverhy
droniumionconcent
ration.
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100 times (100x) larger than the river hydronium ion concentration.D)
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one and a half times (1.5x) larger than the river hydronium ion concentration.
8)
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Anunknownsubstance isaddedto asolution
and thepHdecreases. Thesubstance isbestdescribed asa(n)
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salt.
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B)
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base.
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C)
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acid.
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D) s ol
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Whentheequation belowisbalanced, thecoeffici
ent ofHCl is:
AlCl3 +
H2SO4Al2(SO4)3 +
HCl
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9) ______ _A)
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6
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12
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D) 2
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10) ______A)
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B)
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1
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C)
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3
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D) 1 2
(Show
yourwork for
fullcredit)
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Whentheequation belowisbalanced, thecoeffici
ent ofsodiumcyanideis:
NaCN+H2SO4Na2SO4+ HCN
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11) ______A)
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4
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B)
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2
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C)
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3
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D) 1
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12) ______A)
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1
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B)
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C)
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3
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D) 2
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yourwork forfull
credit)
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Whichof thefollowing iscorrect,according toAvogad
ro'shypothesis?
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13) ______A)
AtS
TP,
1Lofoxygen
gasan
d1Lofliquidwa
tercontainthesamenumbe
rofmolecules.
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At STP, equal volumes of gases contain the same number of molecules.D)
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At STP, equal volumes of gases contain equal masses.
14)
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At STP,22.4liters ofoxygengas,O2, will
have amass of
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14) ______A)
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32.0 g.
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B)
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16.0 g.
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C)
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28.0 g.
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D) 2 2.
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Aspirinhas aformulaC9H8O
4. The
molarmass ofaspirin
is
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15) ______A)
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220 g.
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B)
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95 g.
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180 g.
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D) 3 25
(Show
yourwork forfull
credit)
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Thedensityof O2gas atSTP is
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16) ______A)
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1.43 g/L.
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B)
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1.69 g/L.
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C)
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0.714 g/L.
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17)
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In thereactionCH4 +
2 O2
CO2 +
2 H2O
howmanymolesofoxygenarerequired toburn8.0 g ofmethane?
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17) ______A)
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0.5
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B)
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2.0
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C)
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32
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Aballoonisinflatedoutdoors on acoldday in
NorthDakotaat atemperature of-40Cto avolumeof 2.00L. Thepressureremains
constant. Whatis thevolumeof theballoonindoorsat atemperature of25C?
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18) ______A)
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B)
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2.0 L
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C)
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2.6 L
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D) 1 .6
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your
work forfullcredit)
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Use theidealgas lawtocalculate thevolumeoccupie
d by0.200mol ofnitrogen gas at1.00atmpressure andat 27C.R =0.0821
L* atm/
(K*mol).
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19) ______A)
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4.9 L
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B)
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22.4 L
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C)
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0.44 L
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D) 0 .0
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Themolarity of asolutionthatcontains 0.5moles
ofNaOHin 200milliliters ofwater is
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20) ______A)
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0.5 M.
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B)
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2.5 M.
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1.0 M.
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D) 0 .2
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Withrespecttochemicalbonding, whichparticle
s playthemostactiverole?
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21) ______A)
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valenceelectrons
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B) prot ons
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coreelectrons
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D) neu trons
22)
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Afluorideion is
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22) ______A)
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F+.
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B)
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F2-.
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C)
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F-.
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D) F 2
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Whenmagnesiumreactswithchlorine, thereaction
involvesa
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23) ______A)
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sharing ofelectronsbetween Mgand Cl.
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B) tran sfer of Cl to Mg.
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creation ofelectrons.
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D) tran sfer of Mg to Cl.
24)
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Whichone ofthefollowing hastheLOWES
T
electronegativity?
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fluorine
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B)
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oxygen
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sodium
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D) c hl
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Atomsandmolecules withoddnumbers ofelectron
s arecalled
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25) ______A)
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B)
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odd.
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C)
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D) f re
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Amolecule thathas apartialpositivechargeon one
end andapartialnegativechargeon theotherend is a
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dipole.
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B) non polar molecule.
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binarymolecule.
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D) line ar molecule.
27)
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What isthepredominantforcebetween IBrmolecul
es inliquidIBr?
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27) ______A)
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dispersionforces
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B) dip ole forces
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covalentbonds
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D) hyd rogen bonds
28)
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. Select the nuclide that completes the following nuclear reaction.
41
A)
B)
C)
D)
E)
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29)
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What
v
o
l
u
m
e
o
f1
8
.
0
M
s
u
l
f
u
r
ic
a
c
i
d
m
u
s
t
b
e
us
e
d
t
o
p
r
e
p
a
r
e
1
5
.
5
L
o
f
0
.
1
95 MH2SO4?
a. 0.336 L
b. 226 mL
c. none of these
d. 92.3 mL
e. 168 mL
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29) ______(Show your work for full credit)
30)
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H
o
w
m
a
n
y
g
r
a
m
s
o
f
C
a
C
l
2
(m
o
l
a
r
m
a
s
s
=
1
11
.
0
g
/
m
o
l
)
a
r
en
e
e
d
e
d
t
o
p
r
epare 5.91 L of 0.500 MCaCl2 solution?
a. 198 g
b. 55.5 g
c. 111 g
d. 328 g
e. 297 g
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30) ______
31)
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What
n
u
m
b
e
r
o
fm
o
l
e
s
o
f
s
o
l
u
te
a
r
e
p
r
e
s
e
n
t
in
2
5
.
0
m
L
o
f
2
.
0
0
M
H
C
l
?
a. none of these
b. 0.0500 mol
c. 0.0800 mol
d. 50.0 mol
e. 2.00 mol
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31) ______
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32)
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Calcul
a
t
e
t
h
e
m
ol
a
r
i
t
y
o
f
a
s
o
lu
t
i
o
n
p
r
e
p
a
r
ed
b
y
d
i
s
s
o
l
v
i
n
g
4
.
0
9
g
o
f
N
a
I in enough water to prepare 312 mL of solution.
a. 0.0875 M
b. 0.0131 M
c. 0.175 M
d. 76.3 M
e. 1.66 M
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32) ______(Show your work for full credit)
33)
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Draw
t
h
e
L
e
w
i
ss
t
r
u
c
t
u
r
e
f
o
rK
C
N
.
What is the bond order in this molecule?
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26) ______
34)
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A
36.0-g
sample
of
acetyl
ene,
C2H2(g
), at
STP is
subjec
t to a
new
temper
ature
and
pressu
re of
35 degC and
805
mmHg.Calcul
ate
the
volume
of the
acetyl
ene
under
these
new
condit
ions.
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26) ______
35)
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An
e
m
p
t
y
g
r
ad
u
a
t
e
d
c
y
l
i
n
de
r
w
e
i
g
h
s
5
5
.
26
g
.
W
h
e
n
f
i
l
l
e
d
w
i
t
h
5
0
.
0
m
L of an unknown liquid, it weighs 92.39 g. The density of
the unknown liquid is
a. 0.743 g/mL
b. 1.67 g/mL
c. 37.11 g/mL
d. 0.592 g/mL
e. 50.0 g/mL
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35) ______
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36)
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Fill inthefollowing Table:
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36) ______
PARTICLE CHARGE MASS SYMBOL(S)ProtonNeutronElectronGamma rayAlpha particle ,Positron
37)
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Whatrangeof pH isconsideredacidic?
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C14
6
Undergoesbetadecay.Showthereaction
for thisprocess.
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38) ______
39)
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Complete the
followin
gequatio
n:
Cm23996
+0
1
= ?
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39) ______A)
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B) .
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D)
40)
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Tenmillilite
rs of a 2
mole/liter
solution
of
H2SO4are
added to
a Oneliter
flask.
Water isadded to
exactly
oneliter.
What isthe
resulting
concent
ration ofH2SO4
?(Show
your
work forfull
credit)
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AnswerSectionExam IIEC
spring08
1)
A
2)
A3)
B
4)
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B
5)
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B
6)
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C
7)
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C
8)
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C
9)
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A
10)
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D
13)
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C
14)
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A
15)
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C
16)
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D
18)
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C
19)
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A
20)
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B
21)
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A
22)
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C
23)
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D
24)
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C
25)
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B
28D29 e30 d31
b
32
is zeroto 637 6 2 0
38 = C14
6= 0
1 N
14
7