BÀI 5

Multiple Choice

Which of the following statements about gases is NOT true?

• Gases have definite shape and volume.

• Gases consist of particles in constant random motion.

• Gases can be compressed easily.

• The forces of attraction between gas particles are very weak.

Open Ended

Explain how the concept of Avogadro's number is used to determine the amount of substance in a given sample of gas. Provide an example using Helium.

Fill in the Blank

At standard conditions, 16 grams of Helium gas occupies a volume of ___ dm³.