Test - Unit 2 Matter

Question 1

Matter that has a definite volume in a definite shape is a

Answer 1

Gas

Question 2

Burning gasoline, rotting of an egg , and exploding fireworks are examples of what

Answer 2

Physical change

Question 3

Is another name for a homogeneous mixture

Answer 3

Suspension

Question 4

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

Answer 4

Gas

Question 5

A flask containing molecules of gas a in a separate flask containing Molecules of gas B are both at the same temperature. Gases a & b must have equal what

Answer 5

Average kinetic energies

Question 6

Hydrogen , gold , and iron are all examples of what

Answer 6

Elements

Question 7

What shows the Tyndall effect

Answer 7

Colloids

Question 8

The particles in a liquid are usually

Answer 8

Closer together and lower in energy than in a gas

Question 9

Salt water and lemonade

Answer 9

Homogeneous mixture

Question 10

Trail mix, salad dressing, peanut butter

Answer 10

Heterogeneous mixtures

Question 11

How many grams of NaC1O3 or added to make a saturated solution in 100 g of water at 90°C

Answer 11

180 g

Question 12

Rusting of a fishing pole

Answer 12

Chemical change

Question 13

Boiling water

Answer 13

Physical change

Question 14

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

Answer 14

Unsaturated

Question 15

The solubility of which salt is the least affected by temperature

Answer 15

NaCl

Question 16

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

Answer 16

It will be the same because law of conservation of mass says matter cannot be created or destroyed even in a chemical change