AP Chemistry exam part 2!!?

Question

6. True or False: The rate of a chemical reaction is directly related to the number of collisions that occur between reactant molecules.

a. True

b. False

7. True or False: At equilibrium, all products and reactants coexist.

a. True

b. False

8. True or False: at equilibrium the change in concentration over time for all reactants and products is zero. (Assume no changes in conditions such as temperature or pressure)

a. True

b. False

9. Water molecules are polar molecules (that is they have a dipole moment). This results in which of the following properties of water?

a. Most ionic materials dissolve in water.

b. Water has a high boiling point.

c. Both are true

d. Neither are true.

10. True or False: Temperature does not change during a phase change.

a. True

b. False

11. Which of the following is not the expected atmospheric pressure on Earth at sea level?

a. 1 atmosphere

b. 760 torr

c. 990 mm. Hg.

d. 29.90 in. Hg.

Answer 1

6. True.

7. False.

8. True.

9. Both true.

10. True.

11. 990 mm. Hg