Boyle's law

A sample of hydrogen gas (H₂) has a volume of 4.0 L and a pressure of 1.0 atm. What is the new volume if the pressure is increased to 2.0 atm at constant temperature?

A 10.0 L balloon contains helium gas at a pressure of 655 torr. What is the new pressure when the volume expands to 20.0 L at constant temperature?

The volume of the air in a person’s lungs is 615 ml at a pressure of 760 mmHg. Inhalation occurs as the pressure in the lungs drops to 752 mmHg. At constant temperature, to what volume did the lungs expand?

Imagine that a gas is inside a cylinder with a movable piston. If the volume of a gas is 2.0L when the pressure is 760 torr; what is the volume of the gas if the pressure is halved?

To compress nitrogen at 1 atm from 750 mL to 500 mL, what must the new pressure be if the temperature is kept constant?

If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

I have added 15 L of air to a balloon at sea level (1.0 atm). If I take the balloon with me to Denver, where the air pressure is 0.85 atm, what will the new volume of the balloon be?