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gas laws review

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 

According to the kinetic-molecular theory, particles of matter
a.
are in constant motion.
c.
have different colors.
b.
have different shapes.
d.
are always fluid.
 

 2. 

Which process can be explained by the kinetic-molecular theory?
a.
combustion
c.
condensation
b.
oxidation
d.
replacement reactions
 

 3. 

According to the kinetic-molecular theory, particles of matter are in motion in
a.
gases only.
c.
solids, liquids, and gases.
b.
gases and liquids.
d.
solids only.
 

 4. 

Unlike in an ideal gas, in a real gas
a.
all particles move in the same direction.
b.
all particles have the same kinetic energy.
c.
the particles cannot diffuse.
d.
the particles exert attractive forces on each other.
 

 5. 

According to the kinetic-molecular theory, what is the most significant difference between gases and liquids?
a.
the shapes of the particles
b.
the mass of each particle
c.
the distance between the particles
d.
the type of collision that occurs between particles
 

 6. 

By which process do gases take the shape of their container?
a.
evaporation
c.
adhesion
b.
expansion
d.
diffusion
 

 7. 

Pressure is the force per unit
a.
volume.
c.
length.
b.
surface area.
d.
depth.
 

 8. 

What does the constant bombardment of gas molecules against the inside walls of a container produce?
a.
temperature
c.
pressure
b.
density
d.
diffusion
 

 9. 

What instrument measures atmospheric pressure?
a.
barometer
c.
vacuum pump
b.
manometer
d.
torrometer
 

 10. 

Convert the pressure 0.75 atm to mm Hg.
a.
101.325 mm Hg
c.
570 mm Hg
b.
430 mm Hg
d.
760 mm Hg
 

 11. 

Standard temperature is exactly
a.
100ºC.
c.
0ºC.
b.
273ºC.
d.
0 K.
 

 12. 

Standard pressure is the pressure exerted by a column of mercury exactly
a.
273 mm high.
c.
760 cm high.
b.
760 mm high.
d.
1.00 m high.
 

 13. 

If the temperature of a fixed quantity and volume of gas changes, what also changes?
a.
pressure
c.
mass
b.
density
d.
formula
 

 14. 

If the temperature of a fixed quantity of gas decreases and the pressure remains unchanged,
a.
its volume increases.
c.
its volume decreases.
b.
its volume is unchanged.
d.
its density decreases.
 

 15. 

Why does the air pressure inside the tires of a car increase when the car is driven?
a.
Some of the air has leaked out.
b.
The air particles collide with the tire after the car is in motion.
c.
The air particles inside the tire increase their speed because their temperature rises.
d.
The atmosphere compresses the tire.
 

 16. 

If the temperature of a container of gas remains constant, how could the pressure of the gas increase?
a.
The mass of the gas molecules increases.
b.
The diffusion of the gas molecules increases.
c.
The size of the container increases.
d.
The number of gas molecules in the container increases.
 

 17. 

The volume of a gas is 400.0 mL when the pressure is 1.00 atm. At the same temperature, what is the pressure at which the volume of the gas is 2.0 L?
a.
0.5 atm
c.
0.20 atm
b.
5.0 atm
d.
800 atm
 

 18. 

A sample of oxygen occupies 560. mL when the pressure is 800.00 mm Hg. At constant temperature, what volume does the gas occupy when the pressure decreases to 700.0 mm Hg?
a.
80.0 mL
c.
600. mL
b.
490. mL
d.
640. mL
 

 19. 

At 710. mm Hg, a sample of nitrogen gas occupies 625 mL. What volume does the gas occupy if the temperature remains constant and the pressure increases to 760. mm Hg?
a.
135 mL
c.
600 mL
b.
584 mL
d.
669 mL
 

 20. 

At 7.0ºC, the volume of a gas is 49 mL. At the same pressure, its volume is 74 mL at what temperature?
a.
3.0ºC
c.
120ºC
b.
16ºC
d.
150ºC
 

 21. 

A 180.0 mL volume of gas is measured at 87.0ºC. If the pressure remains unchanged, what is the volume of the gas at standard temperature?
a.
0.0 mL
c.
136 mL
b.
0.5 mL
d.
410 mL
 

 22. 

The volume of a gas is 400. mL at 30.0ºC. If the temperature is increased to 50.0ºC without changing the pressure, what is the new volume of the gas?
a.
375 mL
c.
428 mL
b.
400 mL
d.
600 mL
 

 23. 

As the temperature of a sample of gas falls from 45.0ºC to 30.0ºC, its pressure falls to 300. mm Hg. If the volume did not change, what was the original gas pressure?
a.
285 mm Hg
c.
400. mm Hg
b.
315 mm Hg
d.
615 mm Hg
 

 24. 

If V, P, and T represent the original volume, pressure, and temperature in the correct units, and V2, P2, and T2 represent the new conditions, what is the combined gas law?
a.
test_6_review_files/i0250000.jpg
c.
test_6_review_files/i0250001.jpg
b.
test_6_review_files/i0250002.jpg
d.
test_6_review_files/i0250003.jpg
 

 25. 

The volume of a sample of oxygen is 300.0 mL when the pressure is 1 atm and the temperature is 27.0ºC. At what temperature is the volume 1.00 L and the pressure 0.500 atm?
a.
22.0ºC
c.
0.50 K
b.
45.0ºC
d.
227ºC
 

 26. 

The volume of a sample of hydrogen is 798 mL and it exerts 621 mm Hg pressure at 5.00ºC. What volume does it occupy at standard temperature and pressure?
a.
520. mL
c.
745 mL
b.
640. mL
d.
960 mL
 

 27. 

A 70.0 L sample of gas at 20.0ºC and 600. mm Hg expands to 90.0 L at 15.0ºC. What is the new gas pressure?
a.
318 mm Hg
c.
583 mm Hg
b.
459 mm Hg
d.
710 mm Hg
 

 28. 

A mixture of four gases exerts a total pressure of 860 mm Hg. Gases A and B each exert 220 mm Hg. Gas C exerts 110 mm Hg. What pressure is exerted by gas D?
a.
165 mm Hg
c.
860 mm Hg
b.
310 mm Hg
d.
cannot be determined
 

 29. 

What is the volume of a gas at STP?
a.
22.4 L.
c.
g-mol wt/22.4 L.
b.
g/22.4 L.
d.
1 L.
 

 30. 

The ideal gas law combines Boyle's law, Charles's law, and
a.
Graham's law.
c.
Raoult's law.
b.
Avogadro's law.
d.
Dalton's principle.
 

 31. 

Which is a common unit for the ideal gas constant R?
a.
L·atm
c.
test_6_review_files/i0320000.jpg
b.
mol·K
d.
test_6_review_files/i0320001.jpg
 

 32. 

What is the value of the gas constant?
a.
0.0821 test_6_review_files/i0330000.jpg
c.
0.0281 test_6_review_files/i0330001.jpg
b.
0.0281 L·atm
d.
0.0821 mol·K
 

 33. 

Calculate the approximate volume of a 0.600 mol sample of gas at 15.0ºC and a pressure of 1.10 atm.
a.
12.9 L
c.
24.6 L
b.
22.4 L
d.
129 L
 

 34. 

Calculate the approximate temperature of a 0.50 mol sample of gas at 750 mm Hg and a volume of 12 L.
a.
–7ºC
c.
15ºC
b.
11ºC
d.
288ºC
 

 35. 

What pressure is exerted by 0.750 mol of a gas at a temperature of 0.00ºC and a volume of 5.00 L?
a.
2.1 atm
c.
4.98 atm
b.
3.4 atm
d.
760. atm
 

 36. 

A gas sample with a mass of 0.686 g is collected at 20.ºC and 722.5 mm Hg. The volume is 350. mL. What is the molar mass of the gas?
a.
0.31 g/mol
c.
50. g/mol
b.
2.2 g/mol
d.
720 g/mol
 

 37. 

A gas sample with a mass of 2.50 g is collected at 20.0ºC and 732.5 mm Hg. The volume is 1.28 L. What is the molar mass of the gas?
a.
1.26 g/mol
c.
13.7 g/mol
b.
2.04 g/mol
d.
48.8 g/mol
 

 38. 

What is the density in g/L of hydrogen gas at a temperature of 25ºC, a pressure of 650.0 mmHg?
a.
0.035 g/L
c.
53.2 g/L
b.
0.070 g/L
d.
26.2 g/L
 



 
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