Chem 1+2

Question 1

What are the changes of state

Answer 1

Melting - changing from solid to liquid.
Freezing - changing from a liquid to a solid.
Vapourisation - changing from liquid to gas.
Condensation - changing from gas to a liquid.
Deposition - changing from gas to a solid.
Sublimation - changing from a solid to gas.

Question 2

Physical properties

Answer 2

Physical properties include color, density, hardness, and melting and boiling points.

Question 3

Chemical properties

Answer 3

A chemical property describes the ability of a substance to undergo a specific chemical change

Question 4

What is meant by the conservation of mass

Answer 4

mass is neither created nor destroyed in chemical reactions

Question 5

What substances are pure

Answer 5

gold, copper, oxygen, chlorine, diamond,

Question 6

WHat is distillation

Answer 6

the process of separating the components of a liquid mixture through selective evaporation and condensation.

Question 7

What is chromatography

Answer 7

is a process for separating components of a mixture.