Describing Chemical Reactions

Front

The amount of matter does not change in a chemical reaction.

Back

True. This is known as the Law of Conservation of Mass.

Front

A combination of symbols that represents the elements in a compound is called a __________.

Back

Chemical formula.

Front

In chemistry, when two or more elements or compounds combine to make more complex substances, the process is called __________.

Back

Synthesis.

Front

A process that breaks down compounds into simpler products is called __________.

Back

Decomposition.

Front

In an __________ system, matter can enter or escape from the surroundings.

Back

Open system.

Front

The process of a substance changing from a solid to a liquid is called __________.

Back

Melting.

Front

The process of a substance changing from a liquid to a gas is called __________.

Back

Vaporization.

Front

The process of a substance changing from a gas to a liquid is called __________.

Back

Condensation.

Front

The chemical reaction where oxygen combines with a substance, releasing energy is called __________.

Back

Combustion.

Front

A __________ is a representation of a chemical reaction using symbols and formulas.

Back

Chemical equation.