Test - Unit 2

Question 1

26. The particles in liquid are usually

Answer 1

D. Closer together and lower in energy than in gas.

Unit 2, concept 3, pg. 27

Question 2

32. Is trail mix heterogenous or homogenous

Answer 2

Trail mix is homogenous

Unit 2. Concept 1, pg. 3

Question 3

49. Label the heating curve.

Answer 3

2. Melting, and heat of fusion.
3. Boiling and heat of vaporization.

Unit 2 concept 3, pg. 29

Question 4

50. Label the matter picture.

Answer 4

A= deposition 
B= sublimation 
C= condensation 
D= vaporization 
E= melting                                                   
F= freezing                                     Unit 2 concept 3, pg. 28

Question 5

56. A piece of wood that measures 3cm by 6cm by 4cm has a mass of 80g. What is the density of the wood? If the density of the water is 1g/ml, would the wood float in water? Explain.

Answer 5

Given= length= 3cm, width= 6cm, height=4cm

Unit 2 concept 2, pg. 9

Question 6

58. A graduated cylinder has 33.5 ml of water. A piece of metal is added to the water and the new volume is now 46.2 ml. If the metal has a mass of 16.25. What is its density?

Answer 6

v = 46.2 - 33.5 = 12.7 mL
m = 16.25g
d= ?
d= m/v 
————————————————————————
D = 16.25/12.7=

D= 1.28 g/mL

Unit 2 concept 2, pg. 9

Question 7

59. Name one similarity between compounds and homogeneous mixtures and one difference.

Answer 7

There similarity is they are both made up of two or more elements, and the difference is a compound is chemically combined and mixture is physically