Question 1

A scuba diver descends to a depth where the atmospheric pressure is 2 atm. If the diver's lungs initially contain 6.0 L of air at the surface (1 atm), what will be the volume of air in the diver's lungs at depth, assuming temperature remains constant?
Correct answer: 3.0 L

Accepted Answer

3.0 L

Question 2

Which of the following best explains why atmospheric pressure decreases as altitude increases?
Correct answer: There are fewer air molecules exerting force per unit area at higher altitudes.

Accepted Answer

There are fewer air molecules exerting force per unit area at higher altitudes.

Question 3

A weather balloon is filled with 2.0 moles of helium at 1.0 atm and 300 K. What will the pressure be if the balloon rises and the temperature drops to 250 K, while the volume remains constant?
Correct answer: 0.83 atm

Accepted Answer

0.83 atm

Question 4

Which of the following is NOT a correct conversion for standard atmospheric pressure?
Correct answer: 1 atm = 1000 torr

Accepted Answer

1 atm = 1000 torr

Question 5

A sample of gas occupies 4.0 L at 300 K. If the temperature increases to 600 K at constant pressure, what is the new volume?
Correct answer: 8.0 L

Accepted Answer

8.0 L

Question 6

A patient is given 5.0 L of oxygen at 1.0 atm and 273 K. How many moles of oxygen is this? (R = 0.0821 L·atm/(mol·K))
Correct answer: 0.223 mol

Accepted Answer

0.223 mol

Question 7

Which gas law would you use to solve a problem where the amount of gas and pressure are constant, but temperature and volume change?
Correct answer: Charles' Law

Accepted Answer

Charles' Law

Question 8

A sealed syringe contains air at 1.0 atm and 20°C. If the syringe is placed in an ice bath at 0°C, what happens to the pressure inside, assuming volume is constant?
Correct answer: Pressure decreases because temperature decreases.

Accepted Answer

Pressure decreases because temperature decreases.

Question 9

A 2.0 L container holds nitrogen gas at 3.0 atm and 400 K. If the gas is compressed to 1.0 L and heated to 800 K, what is the new pressure?
Correct answer: 6.0 atm

Accepted Answer

6.0 atm

Question 10

Which of the following best describes the relationship in Avogadro's Law?
Correct answer: At constant temperature and pressure, volume is directly proportional to the number of moles of gas.

Accepted Answer

At constant temperature and pressure, volume is directly proportional to the number of moles of gas.

Question 11

A patient’s ventilator is set to deliver 500 mL of air at 1 atm. If the air is compressed to 250 mL in the lungs at constant temperature, what is the pressure in the lungs?
Correct answer: 2 atm

Accepted Answer

2 atm

Question 12

Which of the following is a real-world example of Boyle’s Law?
Correct answer: A syringe plunger is pulled back, increasing volume and decreasing pressure inside.

Accepted Answer

A syringe plunger is pulled back, increasing volume and decreasing pressure inside.

Question 13

A gas sample at 2.0 atm and 300 K occupies 3.0 L. If the pressure is reduced to 1.0 atm and the temperature is increased to 600 K, what is the new volume?
Correct answer: 12.0 L

Accepted Answer

12.0 L

Question 14

Which of the following statements about atmospheric pressure is correct?
Correct answer: Atmospheric pressure is caused by the collisions of air molecules with surfaces.

Accepted Answer

Atmospheric pressure is caused by the collisions of air molecules with surfaces.

Question 15

A gas occupies 10.0 L at 2.0 atm and 273 K. How many moles of gas are present? (R = 0.0821 L·atm/(mol·K))
Correct answer: 0.89 mol

Accepted Answer

0.89 mol

Question 16

Which of the following is a key step when solving gas law problems involving temperature?
Correct answer: Convert all temperatures to Kelvin.

Accepted Answer

Convert all temperatures to Kelvin.

Question 17

A gas cylinder contains 5.0 L of gas at 3.0 atm and 300 K. If the gas is allowed to expand to 15.0 L at 1.0 atm, what is the final temperature?
Correct answer: 900 K

Accepted Answer

900 K

Question 18

Which of the following best describes the role of atmospheric pressure in supporting life?
Correct answer: It helps remove waste gases and protects organisms from harmful radiation.

Accepted Answer

It helps remove waste gases and protects organisms from harmful radiation.

Question 19

A gas sample has a pressure of 500 mmHg. What is this pressure in atm?
Correct answer: 0.66 atm

Accepted Answer

0.66 atm

Question 20

A medical device requires a pressure of 202650 Pa to function. What is this pressure in atm?
Correct answer: 2.0 atm

Accepted Answer

2.0 atm

Key Concepts of Gas Laws and Atmospheric Pressure

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