# Chemistry Ch14&15 Exam

92 Questions | Attempts: 428  Settings  • 1.
A gas is confined in a steel tank with a volume of 6.982 L. At 20.20°C, the gas exerts a pressure of 8.532 atm. After heating the tank, the pressure of the gas increases to 10.406 atm. What is the temperature of the heated gas?
• A.

–32.60°C

• B.

24.63°C

• C.

84.59°C

• D.

92.64°C

• 2.
How many moles of helium gas are contained in a 4.0-L flask at STP?
• A.

0.045 mol

• B.

0.089 mol

• C.

0.17 mol

• D.

89 mol

• 3.
A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank
• A.

0.002 mol

• B.

0.018 mol

• C.

0.525 mol

• D.

1.90 mol

• 4.
According to Gay-Lussac’s law:
• A.

Pressure is inversely proportional to volume at constant temperature.

• B.

Pressure is directly proportional to temperature at constant volume

• C.

Volume is inversely proportional to temperature at constant pressure

• D.

Volume is directly proportional to temperature at constant pressure.

• 5.
What volume of oxygen is needed to react with solid sulfur to form 6.20 L of sulfur dioxide?
• A.

6.20 L

• B.

7.20 L

• C.

12.4 L

• D.

99.2 L

• 6.
How many moles of steam are produced at 2.00 atm and 202.0°C by the complete combustion of 12.50 L of methane gas?
• A.

0.001 mol

• B.

0.012 mol

• C.

0.640 mol

• D.

1.28 mol

• 7.
Four liters of gas at atmospheric pressure is compressed into a 0.85 L gas cylinder. What is the pressure of the compressed gas if its temperature remains constant?
• A.

0.15 atm

• B.

0.21 atm

• C.

3.4 atm

• D.

4.7 atm

• 8.
When a bicycle reaches the top of a hill with a tire volume of 0.80 L, the atmospheric pressure is 9.0 atm. What is the maximum volume of air that can be filled in the tire just before it bursts?
• A.

0.088 L

• B.

1.2 L

• C.

8.9 L

• D.

11 L

• 9.
When a milkshake is taken in through a straw at a pressure of 0.071 atm, the straw contains 5.0 mL of liquid. How much liquid is consumed at 0.092 atm?
• A.

0.10 mL

• B.

3.9 mL

• C.

6.3 mL

• D.

7.8 mL

• 10.
In a hospital, oxygen is administered to patients at 3.0 atm in a hyperbaric oxygen chamber. Oxygen gas, measuring 600.0 L, is compressed in a cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at the given pressure?
• A.

11 L

• B.

32 L

• C.

11 x 103 L

• D.

32 x 103 L

• 11.
A 2.50 L balloon is filled with water at 2.27 atm. If the balloon is squeezed into a 0.80 L beaker and does NOT burst, what is the pressure of water in the balloon?
• A.

0.72 atm

• B.

0.88 atm

• C.

7.1 atm

• D.

8.8 atm

• 12.
A balloon is filled with 3.50 L of water at 24.0°C and 2.27 atm. If the balloon is placed outdoors on a hot day at a temperature of 34.0°C, what is the volume of the balloon at constant pressure?
• A.

2.47 L

• B.

3.38 L

• C.

3.61 L

• D.

8.19 L

• 13.
The volume of a sample of helium is 4.50 mL at 20.0°C and 203.0 kPa. What will its volume be at 10.0°C and 203.0 kPa?
• A.

2.25mL

• B.

3.78 mL

• C.

4.34 mL

• D.

6.85 mL

• 14.
The volume of a 24.0-g sample of methane gas is 22.8 L at 40.0°C and 4.00 atm. What will its volume be at 68.0°C and 4.00 atm?
• A.

20.9 L

• B.

24.8 L

• C.

38.7 L

• D.

40.8 L

• 15.
A 40.0-L sample of fluorine is heated from 90.0°C to 186.0°C. What volume will the sample occupy at the higher temperature?
• A.

19.3 L

• B.

31.6 L

• C.

50.5 L

• D.

82.6 L

• 16.
A welding torch requires 3200 L of ethylene gas at 3.00 atm. What will be the pressure of the gas if ethylene is supplied by a 250.0-L tank?
• A.

0.231 atm

• B.

2.34 atm

• C.

38.4 atm

• D.

45.4 atm

• 17.
The volume of a gas is 1.50 L at 30.0°C and 1.00 atm. What volume will the gas occupy if the temperature is raised to 134.0°C at constant pressure?
• A.

0.331 L

• B.

1.11 L

• C.

2.01 L

• D.

6.70 L

• 18.
A sample of carbon dioxide occupies a 2.54 dm3 container at STP. What is the volume of the gas at a pressure of 150.0 kPa and a temperature of 26.0°C?
• A.

0.180 dm3

• B.

1.88 dm3

• C.

2.24 dm3

• D.

4.65 dm3

• 19.
A diver finds the best corals at a depth of approximately 10.0 m. The 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 10.00 m, at a temperature of 21.0°C, and a pressure of 141.20 kPa?
• A.

1.12 L

• B.

1.66 L

• C.

1.78 L

• D.

4.86 L

• 20.
One liter of a gas has a pressure of 150.00 kPa at 25.0°C. If the pressure increases to 600.0 kPa and the temperature to 100.0°C, what would be the new volume of the gas?
• A.

0.200 L

• B.

0.312 L

• C.

1.00 L

• D.

2.90 L

• 21.
The variable that stays constant when using the combined gas law is
• A.

Amount of gas

• B.

Pressure.

• C.

Temperature.

• D.

Volume.

• 22.
The equation for the combined gas law can be used instead of which of the following equations?
• A.

Boyle’s law

• B.

Charles’s law

• C.

Gay-Lussac’s law

• D.

All of these

• 23.
Which of the following expresses Avogadro’s principle?
• A.

Equal volumes of gases at the same temperature and pressure contain equal numbers of particles.

• B.

One mole of any gas will occupy a certain volume at STP.

• C.

STP stands for standard temperature and pressure.

• D.

The molar volume of a gas is the volume that one mole occupies at STP.

• 24.
What information is NOT given by the coefficients in a balanced chemical equation?
• A.

The mass ratios of reactants and products

• B.

The mole ratios of reactants and products

• C.

The ratios of number of molecules of reactants and products

• D.

The volume ratios of gaseous reactants and products d. the volume ratios of gaseous reactants and products the volume ratios of gaseous reactants and products

• 25.
What volume will one mole of a gas occupy under standard temperature and pressure?
• A.

1 L

• B.

22.4 L

• C.

273 L

• D.

293 L

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