Post-test
Directions: Read the questions carefully. Write the letter of the correct answer on your

answer sheet.

1. According to Kinetic Molecular Theory, which of the following statements is NOT

TRUE about gases?

a. Gases consist of tiny molecules.

b. Gas molecules are never attracted with other gas molecules.

c. The average kinetic energy of gas molecules is directly related to its

temperature.

d. Gas molecules move randomly in different directions, continuously colliding

with one another.

2. What is the relationship between the volume and the number of moles at constant

temperature and pressure?

a. direct square c. directly proportional

b. inverse square d. inversely proportional

3. What will be the final volume of 85 mL of 2.0 moles of H2, if the amount of gas is

increased to 4.0 moles provided that the temperature and pressure remain

constant?

a. 0.07 L b. 0.10 L c. 0.17 L d. 1.70 L

4. What does the equation PV = nRT represent?

a. Boyle’s Law c. Ideal Gas Law

b. Charles’ Law d. Combined Gas Law

5. A sample of liquid acetone is placed in a 25.0 mL flask and vaporized by the

heating to 75.00C at 1.02 atm. The vapor weighs 5.87 g. Calculate the number of

moles of the acetone.

a. 8.92 x 10-2 mole of acetone c. 8.92 x 10-6 mole of acetone

b. 8.92 x 10-4 mole of acetone d. 8.92 x 10-8 mole of acetone​