Balancing Chemical Reactions

Front

What does the Law of Conservation of Mass say?

Back

During a chemical reaction, mass is neither created nor destroyed.

Front

What must be true for a chemical equation to be balanced?

Back

There must be an equal amount of atoms on both sides.

Front

Is the following equation balanced or unbalanced? Ag + O2 --> 2Ag2O

Back

Unbalanced.

Front

Is the following equation balanced or unbalanced? H4 + O2 --> 2H2O

Back

Balanced.

Front

What do the blue numbers in a chemical equation represent?

Back

Subscripts.

Front

What is a chemical reaction?

Back

A process where reactants are transformed into products.

Front

What are reactants in a chemical equation?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical equation?

Back

Substances formed as a result of a chemical reaction.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are present.

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the same number of each type of atom is present on both sides.