D
T
b
= ik
b
m
D
T
f
= ik
f
m
P
= iMRT
P
solv
=
c
solv
P
o
solv
1.
Which of the following has the
highest
boiling point?
A.
I
2
B.
Br
2
C.
F
2
D.
Cl
2
E.
Ar
2.
For which of the following substances would hydrogen bonding be most important?
A.
NH
3
B.
HI
C.
CH
4
D.
H
2
E.
GeH
4
3.
If gold has a face-centered cubic unit cell, how many atoms of gold does the unit cell contain?
A.
4
B.
7
C.
2
D.
5
E.
14
4.
A structure with an ABABAB... pattern of layers is called
A.
body-centered cubic.
B.
primitive cubic.
C.
face-centered cubic.
D.
cubic close-packed.
E.
hexagonally close-packed.
5.
Potassium has a body-centered cubic unit cell. If the edge length of the unit cell is 508 pm, what is the atomic radius of potassium?
A.
180 pm
B.
359 pm
C.
254 pm
D.
127 pm
E.
220 pm
6.
Which of the following apply to the unit cell shown below?
A.
The unit cell is cubic close-packed and has a coordination number of 12.
B.
The unit cell is body-centered cubic and has a coordination number of 8.
C.
The unit cell is face-centered cubic and has a coordination number of 8.
D.
The unit cell is cubic close-packed and has a coordination number of 8.
E.
The unit cell is face-centered cubic and has a coordination number of 12.
7.
Which of the following has the
highest
vapor pressure at room temperature?
A.
acetic acid, CH
3
COOH
B.
dimethylether, CH
3
OCH
3
C.
methanol, CH
3
OH
D.
ethanol, CH
3
CH
2
OH
E.
water, H
2
O
8.
The phase diagram for a pure compound is given below. The triple point occurs at
A.
300 atm and 400 K.
B.
50 atm and 200 K.
C.
greater than 200 atm and greater than 400 K.
D.
0 atm and 0 K.
E.
200 atm and 400 K.
9.
The critical temperature and pressure of carbon dioxide are 31°C and 73 atm. What phase of CO
2
exists at 32°C and 74 atm?
A.
vapor
B.
supercritical CO
2
in equilibrium with liquid
C.
liquid
D.
vapor in equilibrium with liquid
E.
one phase called supercritical CO
2
10.
The vapor pressure of water at 25°C is 24 Torr. The vapor pressure at 50°C is about
A.
25 Torr
B.
760 Torr
C.
100 Torr
D.
23 Torr
E.
24 Torr
11.
Which of the following would likely be
most soluble
in water?
A.
CaHPO
4
B.
Ca
3
(PO
4
)
2
C.
CaCO
3
D.
Ca(NO
3
)
2
E.
Ca
5
(PO
4
)
3
OH
12.
The lattice enthalpy of KBr is 689 kJ·mol
–1
and the hydration enthalpy is –669 kJ·mol
–1
. Estimate the enthalpy of solution of KBr.
A.
–1360 kJ·mol
–1
B.
–20 kJ·mol
–1
C.
+669 kJ·mol
–1
D.
+20 kJ·mol
–1
E.
+1360 kJ·mol
–1
13.
Which of the following is likely to have the
largest exothermic
hydration enthalpy?
A.
Ca
2+
B.
Li
+
C.
Al
3+
D.
Mg
2+
E.
Na
+
14.
Calculate the vapor pressure at 80°C of a solution prepared by dissolving 3.00 moles of glucose in 200. g of water. The vapor pressure of water at 80°C is 355 Torr and the molar mass of water is 18.02 g·mol
–1
.
A.
279 Torr
B.
75.5 Torr
C.
760 Torr
D.
355 Torr
E.
431 Torr
15.
Calculate the freezing point of a 14.0 m aqueous solution of ethylene glycol. The
k
f
for water is 1.86 K·kg·mol
–1
.
A.
0°C
B.
–52°C
C.
–0.11°C
D.
–7.5°C
E.
–26°C
16.
Which of the following aqueous solutions would have the lowest freezing point?
A.
1.0
m
glucose
B.
2.5
m
sucrose
C.
2.0
m
silver nitrate
D.
1.5
m
calcium chloride
E.
2.0
m
sodium chloride
17.
The addition of 1.96 g of vitamin B
12
, isolated as cyanocobalamin, to 100. g camphor lowers the freezing point by 0.57°C. What is the molar mass of vitamin B
12
? The
k
f
for camphor is 39.7 K·kg·mol
–1
.
A.
0.97 kg/mol
B.
1.12 kg/mol
C.
1.37 kg/mol
D.
1.85 kg/mol
E.
2.24 kg/mol
18.
Blood, sweat, and tears are about 0.15 M in sodium chloride. Estimate the osmotic pressure of these solutions at 37°C. The gas constant is 0.0821 L·atm·K
–1
·mol
–1
. (Hint: The effective molarity of all particles must be used.)
A.
1.8 atm
B.
11 atm
C.
7.6 atm
D.
0.91 atm
E.
3.8 atm
19.
All of the following are
independent
of temperature
except
A.
molarity.
B.
molality.
C.
mole fraction.
D.
mass percent.
E.
grams of solute per total mass of solute plus solvent.
20.
The osmotic pressure of 2.0 g of a polymer dissolved in enough benzene to give 200. mL of solution is 11.25 Torr at 25°C. Calculate the average molar mass of the polymer. The gas constant is 0.0821 L·atm·K
–1
·mol
–1
.
A.
1.3 kg/mol
B.
3.8 kg/mol
C.
12 kg/mol
D.
17 kg/mol
E.
23 kg/mol
This is the end of the test. When you have completed all the questions and reviewed your answers, press the button below to grade the test.