Test-U2 Matter

Question 1

10.Three examples of physical changes are

Answer 1

Boiling of water, blowing up a balloon, and melting a candle

U2-c2
Pg11

Question 2

16.Increasing the surface area of a solid

Answer 2

Increases the speed of dissolving
U2-c4
Pg32

Question 3

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

Answer 3

Average kinetic energies
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Pg28

Question 4

37.burning popcorn and making water

Answer 4

CC
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Pg10

Question 5

40.boiling water

Answer 5

PC
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Pg10

Question 6

44. How many grams of NAC103 are needed to make a saturated solution in 100 g of water at 90°C

Answer 6

180g
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Pg33

Question 7

45. In terms of saturation how would you classify a KBR solution with a concentration of 90 g in 100 g of water at 10°C

Answer 7

Supersaturated
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Pg33

Question 8

46. In terms of saturation how would you classify a KNO3 solution of 30 g in 100 g of water at 40°C

Answer 8

Unsaturated
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Pg33

Question 9

52. Bose-Einstein condensates are used to simulate conditions in a

Answer 9

Black hole
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Pg27

Question 10

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

Answer 10

It will stay the same because the kinetic molecular theory states that
U2-c3
Pg27