Unit 9 PART1: Gases

What will happen to the volume of a gas under constant temperature if the pressure decreases?

• Increase

• Decrease

• Nothing

Pressure is caused by ______.

• gravity.

• gas molecules colliding with each other.

• gas molecules colliding with walls of the container.

• gas molecules reacting with each other.

What is the Gas Variable that describes the amount of particles in a sample of gas?

• Volume

• Pressure

• Temperature

• Mole

The amount of space that a substance or object occupies.

• Volume

• Pressure

• Temperature

• Mole

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

According to Boyle's law, at constant temperature, as the pressure of a given sample of gas is increased, the volume will –

• Increase
• Decrease
• Remains the same

What is the Gas Variable that describes the average kinetic energy of a sample of gas?

• Volume

• Pressure

• Temperature

• Mole

The main idea of the Kinetic Molecular Theory is that all molecules have 

• mass
• motion/movement
• volume
• moles

What is the equation for Avogadro's Law?

• P₁V₁=P₂V₂

• V₁/T₁=V₂/T₂

• V₁/n₁=V₂/n₂

• PV = nRT

If 1.00 mol of He occupies 22.4 L, what volume will 0.25 moles of He occupy under same condition?

• 22.4 L

• 5.60 L

• 10.2 L

• 8.16 L