Gas Behavior and Diffusion Concepts

What does Graham's Law state about the rate of diffusion for a gas?

• It is directly proportional to the square root of its molar mass.

• It is inversely proportional to the square root of its molar mass.

• It is inversely proportional to its density.

• It is directly proportional to its density.

Which of the following is an example of diffusion?

• The smell of bacon reaching your room from the kitchen.

• A balloon shrinking over time.

• Helium escaping from a balloon.

• Water boiling in a kettle.

What is effusion?

• The movement of gas particles through a small opening.

• The expansion of gas in a balloon.

• The movement of gas particles from high to low concentration.

• The mixing of two gases in a container.

In the context of Graham's Law, which gas will diffuse faster?

• A gas with a lower density.

• A gas with a higher molar mass.

• A gas with a higher density.

• A gas with a lower molar mass.

When comparing hydrogen chloride and ammonia, where are they likely to meet in a tube?

• Closer to the ammonia end.

• They will not meet.

• In the middle of the tube.

• Closer to the hydrogen chloride end.

How do you calculate the rate of diffusion of a gas using Graham's Law?

• By comparing their diffusion times.

• By comparing the square roots of their molar masses.

• By comparing their volumes.

• By comparing the square roots of their densities.

If a gas diffuses three times faster than oxygen, what is its molar mass?

• 10.67 g/mol

• 3.55 g/mol

• 96 g/mol

• 32 g/mol

Why does inhaling helium make your voice sound higher?

• Helium is less dense than air, speeding up sound waves.

• Helium absorbs sound waves.

• Helium is denser than air, slowing sound waves.

• Helium changes the pitch of your vocal cords.

What happens to your voice when you inhale sulfur hexafluoride?

• It becomes higher.

• It becomes lower.

• It remains the same.

• It becomes distorted.

How does the density of a gas affect the speed of sound through it?

• Higher density increases the speed of sound.

• Lower density decreases the speed of sound.

• Density has no effect on the speed of sound.

• Higher density decreases the speed of sound.