Gas Density

If a gas's density decreases, its particles are now...

• smaller

• farther apart

• bigger

• closer together

This state of matter is: free to expand and takes the shape of its container

• solid

• liquid

• gas

Why does a hot air balloon float in air?

• Air is less dense than water.

• The density of hot air is less than the density of cold air.

• Air is denser on cold days.

• The overall density of the balloon and its basket is less than the density of the air.

What is the relationship between the density of a gas and its temperature?

• As temperature increases, density increases.

• As temperature increases, density decreases.

• Temperature does not affect gas density.

• Gas density is always constant.

Which of the following gases will have the highest density at standard temperature and pressure (STP)?

• Helium

• Oxygen

• Hydrogen

• Nitrogen

If a gas is compressed to half its volume while keeping the temperature constant, what happens to its density?

• Density remains the same.

• Density is halved.

• Density is doubled.

• Density is quadrupled.

Which of the following factors does NOT affect the density of a gas?

• Temperature

• Pressure

• Volume

• Color

A gas has a density of 1.25 kg/m³ at 0°C. What will happen to its density if the temperature is increased to 100°C at constant pressure?

• Density will increase.

• Density will decrease.

• Density will remain the same.

• Density will become zero.

Tags

NGSS.MS-PS1-4

Why does carbon dioxide have a higher density than oxygen at the same temperature and pressure?

• Carbon dioxide molecules are heavier.

• Oxygen molecules are heavier.

• Carbon dioxide is a noble gas.

• Oxygen is a noble gas.

Tags

NGSS.MS-PS1-1

Which gas law can be used to explain the change in density of a gas with temperature?

• Boyle's Law

• Charles's Law

• Avogadro's Law

• Dalton's Law

Tags

NGSS.MS-PS1-4