- 1. The same amount of hydrogen gas is in both containers. The pressure in Container B is —
A) ½ the pressure in Container A
B) ¼ the pressure in Container A
C) 2 times the pressure in Container A
D) 4 times the pressure in Container A
- 2. What is the pressure inside a container if it contains neon gas at a pressure of 3.0 atm, helium gas at a pressure of 1.0 atm and nitrogen gas at a pressure of 4.0 atm?
A) 12.0 atm
B) 0.0821 atm
C) 6.0 atm
D) 8.0 atm
- 3. If the number of moles of gas inside of a container increases, what will happen to the volume of the container if both temperature and pressure are kept constant?
A) The volume will remain constant.
B) None of the above.
C) The volume will increase.
D) The volume will decrease.
- 4. At which of the following temperatures would the motion of all of an objects particles come to a complete stop?
A) 0o C
B) 373 K
C) 0 K
D) -100o C
- 5. A container is filled with helium gas. It has a volume of 4.0 liters and is at a temperature of 20.oC. If the temperature of the container is increased to 35 oC without removing any of the gas or changing the pressure, what will the new volume be?
A) 60 liters
B) 4.2 liters
C) 7.0 liters
D) 3.7 liters
- 6. A container is filled with neon gas. It has a volume of 1.50 L and a pressure of 101.3 kPa. If the volume of the container is increased to 4.00 L without removing any of the gas or changing the temperature, what will the new pressure be?
A) 67.5 kPa
B) 152 kPa
C) 0.0592 kPa
D) 38.0 kPa
- 7. 3.00 moles of helium gas (He) are in a container with a volume is 2.00 liters and a temperature is at 298 K. What is the approximate pressure in kilopascals?
A) 7150 kPa
B) 4950 kPa
C) 3710 kPa
D) 14900 kPa
- 8. There are 2.00 moles of an ideal gas in a container. What is the volume of this ideal gas if the pressure of the gas is 2.00 atm and the temperature is 100.0oC?
A) 400 liters
B) 8.21 liters
C) 30.6 liters
D) 3100 liters
- 9. What would be the volume of 4.00 moles of nitrogen gas at standard temperature and pressure (STP)?
A) 145 L
B) 112 L
C) 89.6 L
D) 5.60 L
- 10. CO2, N2 and He gas are inside of a container. The total pressure exerted by the gases is 10 atmospheres. The CO2 exerts a pressure of 3.5 atm and the N2 exerts a pressure of 2.7 atm. How much pressure is exerted by the helium gas?
A) 16.2 atm
B) 3.8 atm
C) 6.2 atm
D) 0.0821 atm
- 11. There are 12.00 moles of an ideal gas kept inside a container with a volume of 2.50 liters. It is kept at room temperature (20oC). What is the approximate pressure of the gas in kilopascals?
A) 115 kPa
B) 798 kPa
C) 11 690 kPa
D) 8 790 kPa
- 12. There are 3.0 moles of an ideal gas in a container. What is the volume of this ideal gas if the pressure of the gas is 2.0 atm and the temperature is 100oC?
A) 67 L
B) 46 L
C) 17 L
D) 12 L
- 13. A gas cylinder with a volume of 3.00 L contains 8.00 moles of oxygen gas at a temperature of 50.0 K. What is the pressure inside the cylinder?
A) 1110 kPa
B) 2220 kPa
C) 504 kPa
D) 3320 kPa
- 14. A tank contains N2 at 1.0 atm and O2 at 2.0 atm. Helium is added to this tank until the total pressure is 6.0 atm. What is the partial pressure of the helium?
A) 3.0 atm
B) 2.0 atm
C) 4.0 atm
D) 1.0 atm
- 15. A gas cylinder is filled with 4.00 moles of oxygen gas at 300.0 K. The piston is compressed to yield a pressure of 400.0 kPa. What is the volume inside the cylinder?
A) 6.25 L
B) 31.5 L
C) 24.9 L
D) 3.19 L
- 16. Industrial deep-sea divers must breathe a mixture of helium and oxygen to prevent a disorienting condition known as nitrogen narcosis. If a diver’s tank is filled with a helium-oxygen mixture to a pressure of 170 atmospheres and the partial pressure of helium is 110 atmospheres, the partial pressure of the oxygen is —
A) 140 atm
B) 280 atm
C) 110 atm
D) 60 atm
- 17. A gas has a volume of 100.0 mL at a pressure of 600.0 mm Hg. If the temperature is held constant, what is the volume of the gas at a pressure of 800.0 mm Hg?
A) 133.0 mL
B) 66.67 mL
C) 33.33 mL
D) 75.00 mL
- 18. What is the volume occupied by 3.00 moles of ammonia gas at STP?
A) 0.439 L
B) 91.9 L
C) 67.2 L
D) 22.8 L
- 19. A container is filled with helium gas. It has a volume of 2.25 liters and contains 9.00 moles of helium. How many moles of helium could be held in a 1.85 liter container at the same temperature and pressure.
A) 0.463 mol
B) 7.40 mol
C) 37.5 mol
D) 10.9 mol
- 20. A 40.0 liter gas tank contains 70.0 moles of hydrogen gas. What would be the volume of the tank which could hold 50.0 moles of hydrogen gas at the same temperature and pressure?
A) 62.3 L
B) 56.0 L
C) 28.6 L
D) 87.5 L
- 21. The diagram below shows a gas with an initial pressure of 3060 mm Hg in a cylinder at a constant temperature. The gas expands inside the cylinder and pushes the piston up.What is the final pressure of the gas after the expansion?
A) 544 mm Hg
B) 784 mm Hg
C) 6212 mm Hg
D) 1830 mm Hg
- 22. Which of the following is a primary assumption of the kinetic molecular theory?
A) Gases are mainly composed of metallic elements
B) Gas particles are motionless at high pressure
C) The speed of gas particles is related to their temperature
D) The mass of all gases is virtually constant at STP
- 23. Amedeo Avogadro contributed to our understanding of the behavior of gases by determining the relationship between the volume of a gas and the -
A) barometric pressure
B) absolute temperature
C) kinetic energy
D) number of moles
- 24. A sample of a gas is in a cylinder as shown. If the temperature is kept constant and the piston moves down to decrease the volume, the pressure increases because the gas particles —
A) collide more frequently with the container
B) lose velocity within the container
C) expand
D) become smaller
- 25. Charles’ Law states that if a given quantity of gas is held at a constant pressure, then its volume is directly proportional to the absolute temperature. This law explains why —
A) the pressure of a gas increases when volume decreases
B) solids require heat in order to change into gases
C) a gas-filled balloon expands when it is heated
D) some gases only react with each other at high temperatures
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