True/False
Indicate whether the
statement is true or false.
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1.
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Forces that act between two
molecules are referred to as intermolecular forces.
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2.
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When the molecules of gases are
heated, the average kinetic energy of the molecules increases.
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3.
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Zero on the Celsius scale is
also known as absolute zero.
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4.
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Molarity is the number of moles
of solute dissolved per liter of solution
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Multiple
Choice
Identify the letter
of the choice that best completes the statement or answers the question.
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5.
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In the equation
H2(g) + Cl2(g) → 2HCl(g), one volume of hydrogen yields how many volumes of hydrogen
chloride?
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6.
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Equal volumes of diatomic gases
under the same conditions of temperature and pressure contain the same number of
a. | protons. | c. | molecules. | b. | ions. | d. | Dalton's "ultimate
particles." |
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7.
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The standard molar volume of a
gas at STP is
a. | 22.4 L. | c. | g-mol wt/22.4 L. | b. | g/22.4 L. | d. | 1 L. |
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8.
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What is the volume occupied by
1 mol of oxygen at STP?
a. | 11.2 L | c. | 22.4 L | b. | 16.0 L | d. | 32.0 L |
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9.
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What is the volume occupied by
1 mol of water vapor at STP?
a. | 11.2 L | c. | 22.4 L | b. | 18.0 L | d. | 33.6 L |
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10.
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A 1.00 L sample of a gas has a
mass of 1.25 g at STP. What is the mass of 1 mol of this gas?
a. | a little less then 1.0
g | c. | 22.4
g | b. | 1.25
g | d. | 28.0 g |
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11.
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What is the value of the gas
constant?
a. | 0.0821  | c. | 0.0281 
| b. | 0.0281 L·atm | d. | 0.0821 mol·K |
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12.
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What is the pressure exerted by
1.2 mol of a gas with a temperature of 20.˚C and a volume of 9.5 L?
a. | 0.030
atm | c. | 3.0
atm | b. | 1.0 atm | d. | 30. atm |
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13.
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The equation for the complete
combustion of methane is CH4(g) + 2O2(g) → 2H2O(g) +
CO2(g). If 50 L of methane at STP are burned, what volume of carbon dioxide will be
produced at STP?
a. | 16.6 L | c. | 50 L | b. | 25 L | d. | 100 L |
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14.
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If the temperature of a closed
liquid-vapor equilibrium system is raised, its vapor pressure
a. | decreases. | c. | remains the same. | b. | increases. | d. | shows no correlation. |
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15.
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At about what temperature does
water reach its maximum density?
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16.
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Which of the following is an
electrolyte?
a. | sodium
chloride | c. | water | b. | sugar | d. | glass |
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17.
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Raising solvent temperature
causes solvent-solute collisions to become
a. | less frequent and more
energetic. | c. | less frequent and
less energetic. | b. | more frequent and more energetic. | d. | more frequent and less
energetic. |
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18.
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What is the molarity of a
solution that contains 0.202 mol KCl in 7.98 L solution?
a. | 0.0132
M | c. | 0.459
M | b. | 0.0253
M | d. | 1.363 M |
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19.
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What is the molality of a
solution that contains 31.0 g HCl in 5.00 kg water?
a. | 0.062 m | c. | 0.170 m | b. | 0.425 m | d. | 15.5 m |
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20.
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How many moles of ions are
produced by the dissociation of 1 mol of MgCl2?
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21.
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Which compound dissociates to
produce the ions Ca2+(aq) and
NO3–(aq)?
a. | CaNO3(s) | c. | Ca(NO3)2(s) | b. | Ca2NO3 | d. | Ca2(NO3)3 |
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22.
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A water solution containing an
unknown quantity of a nonelectrolyte solute has a freezing point of –0.665˚C. What is the
molal concentration of the solution if Kf = –1.86˚C/m?
a. | 0.010 m | c. | 0.358 m | b. | 0.355 m | d. | 2.66 m |
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23.
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Which is NOT a value equal to 1
atm of pressure?
a. | 760
torr | c. | 101.3
kPa | b. | 1 psi | d. | 760
mmHg |
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24.
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A sample of three mixed gases
is at 632.0 mmHg. If the partial pressure of CO2 is 124.3 mmHg and the partial pressure of N2 is 461.9 mmHg,
what is the partial pressure of O2?
a. | 760
mmHg | c. | 173.8
mmHg | b. | 45.8 mmHg | d. | 128 mmHg |
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25.
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Which is an intermolecular
force?
a. | ionic
bond | c. | hydrogen
bond | b. | covalent bond | d. | metallic bond |
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26.
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Which is the triple point of
this substance?
a. | 88° C, 0.95
atm | c. | 150° C, 1.45
atm | b. | 110° C, 1.00 atm | d. | 36° C, 2.1 atm |
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27.
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Which is the point at which
this substance will boil at normal atmospheric pressure?
a. | 88°C, 0.95
atm | c. | 110°C, 1.00
atm | b. | 100°C, 0.95 atm | d. | 0°C, 0.18 atm |
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28.
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Hospital patients are
administered oxygen from an pressurized hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in
a cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at the given pressure?
a. | 11 L | c. | 11 x 103 L | b. | 32 L | d. | 32 x 103
L |
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29.
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At an ocean depth of 10.0 m, a
diver’s lung capacity is 2.40 L. The air temperature is 32.0°C and the pressure is 101.30
kPa. What is the volume of the diver’s lungs at the same depth, at a temperature of 21.0°C
and a pressure of 141.20 kPa?
a. | 1.12 L | c. | 1.78 L | b. | 1.66 l | d. | 4.86 L |
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30.
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What volume does .0685 mol of
gas occupy at STP?
a. | .3707
mol | c. | 1.53
L | b. | .7515
mol | d. | 3.06 L |
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31.
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What volume of oxygen is needed
to react with solid sulfur to form 6.20 L of sulfur dioxide?
a. | 6.20 L | c. | 12.4 L | b. | 7.20 L | d. | 99.2 L |
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32.
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The erratic movement of colloid
particles is called:
a. | Brownian
motion | c. | Slow
motion | b. | Colloidal motion | d. | Suspended motion |
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Short Answer
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33.
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If 0.85 g of gas at 4.0 atm of
pressure dissolves in 1.0 L of water at 25°C, how much will dissolve in 1.0 L of water at 1.0
atm of pressure and the same temperature?
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Problem
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34.
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What is the molarity of a
methanol solution that contains 25 g of methanol in 3.5 L of a solution? The molar mass of methanol
is 32 g/mol.
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35.
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A 41.0-mL barium hydroxide
solution of molarity 3.41 M is
diluted with water to form 279 mL of the solution. Calculate the molarity of the
solution.
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