Test - Unit 2 Matter

Question 1

11. Which of the following is not a physical property?

Answer 1

Reactivity with oxygen

Unit 2 Concept 2 pg 1

Question 2

17. In which phase of matter are the molecules of the substance farthest apart from each other?

Answer 2

Gas

Unit 2 Concept 3 pg 2

Question 3

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

Answer 3

Evaporation

Unit 2 Concept 3 pg 3

Question 4

26. The particles in a liquid are usually?

Answer 4

Closer together and lower energy than in a gas

Unit 2 Concept 3 pg 2

Question 5

29. Which of the following liquids would be the most viscous?

Answer 5

Syrup

Unit 2 Concept 2 pg 1

Question 6

36. Fragrance of a flower?

Answer 6

PP

Unit 2 Concept 2 pg 3

Question 7

37. Burning popcorn and making water?

Answer 7

CC

Unit 2 Concept 2 pg 3

Question 8

39. Inflating a tire?

Answer 8

PC

Unit 2 Concept 2 pg 3

Question 9

40. Boiling water?

Answer 9

PC

Unit 2 Concept 2 pg 3

Question 10

41. Density of an object?

Answer 10

PP

Unit 2 Concept 2 pg 3

Question 11

42. Sharpening a pencil?

Answer 11

PC

Unit 2 Concept 2 pg 3

Question 12

44. How many grams of NaClO3 are added to make a saturated solution in 100g of water at 90% C?

Answer 12

NA, 180g

Unit 2 Concept 4 pg 2

Question 13

44. In terms of saturated, how would you classify a KBr solution with a concentration of 90g in 100g of water at 10% C?

Answer 13

Supersaturated

Unit 2 Concept 4 pg 2

Question 14

46. In terms of saturated, how would you classify a KNO3 solution of 30g in 100g of water at 40% C?

Answer 14

Unsaturated

Unit 2 Concept 4 pg 2

Question 15

47. At what temperature is the solubility of KBr the same as that of KNO3?

Answer 15

35% C

Unit 2 Concept 4 pg 2

Question 16

50. Label A on the states of matter picture?

Answer 16

A= Sublimation/ solid to gas

Unit 2 Concept 3 pg 3

Question 17

53. Iron and oxygen react to form rust. What will happen to the mass of the rust compared to the mass of the iron and oxygen before the reaction? Explain why this will occur?

Answer 17

Same because laws of conversation of mass says matter cannot be created or destroyed, even in a chemical change
Unit 2 Concept 2 pg 4

Question 18

56. A piece of wood that measures 3cm by 6cm by 4cm has a mass of 80g. A) what is the density of the wood? Circle A; B) if the density of water is 1g/ml, would the wood float in water? Explain?

Answer 18

V= 3 x 6 x 4= 72cm3
M= 80g
D= ?
D= m/v
D= 80/72
D= 1.11 g/ml 
It will not float, it will sink because it has a density that is greater than water.
Unit 2 Concept 2 pg 2

Question 19

57. Find the mass of a 50ml volume of water if the density of water is 1g/ml?

Answer 19

M= ?
V= 50ml
D= 1g/ml
(V)d= m/v
M= vid
M= (50)1
M= 50g
Unit 2 Concept 2 pg 2

Question 20

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

Answer 20

V= 46.2 - 33.5= 12.7ml
M= 16.25g
D= ?
D= m/v
D= 16.25/12.7
D= l.28g/ml
Unit 2 Concept 2 pg 2

Question 21

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

Answer 21

Similarity= Both have 1 element
Difference= compound Is chemically combined and a mixture is physically
Unit 1 Concept 1 pg 1 and 2

Question 22

60. Explain how salt dissolves in water?

Answer 22

-H+ of water attract Cl-
-0-2 of water attract Na+
-Attractive force pulls ions away from crystal
-Water surrounds each ion and continues until ions are separated
Unit 2 Concept 4 pg 3