Test - Unit 2 Matter

Question 1

19. A flask containing molecules of gas A and a separate flask containing molecules of gas B are both at the same. Gases A and B must have equal

Answer 1

average kinetic energies

U2 C3 pg 1

Question 2

21. A type of matter formed by chemically joining two or more element is known as a

Answer 2

compound

U2 C1 pg 1

Question 3

22. Which shows the Tyndall effect?

Answer 3

colloids

U2 C1 pg 3

Question 4

23. Which term best describes when particles escape from the surface of a liquid and become gaseous?

Answer 4

evaporation

U2 C3 pg 3

Question 5

26. The particles in a liquid are usually

Answer 5

closer together and lower in energy than in a gas

U2 C3 pg 2

Question 6

32. Label the mixtures in #31-35 as (HO) or (HE)

Answer 6

Heterogeneous

U2 C1 pg 2

Question 7

38. Label #36-43 as a PP, PC,CP or CC

Answer 7

CP

U2 C2 pg 3

Question 8

55. List and explain the 3 factors that increase the solubility (dissolving) rate of a substance

Answer 8

1. smaller solute size
   • increases the surface area on the solute so the solvent has more places for contact
2. heating the solvent
   • increasing the temperature increases the kinetic energy of the particles, therefore more collisions
3. heating the solvent
   • increasing the temperature increases the kinetic energy of the particles, therefore more collisions

U2 C4 pg 3