Which of the following best describes a chemical equation that demonstrates the law of conservation of matter?

A. It has five total atoms on each side.

B. It has four molecules on each side.

C. It has two compounds on each side.

D. It has three atoms of hydrogen on each side.

A). It Has 5 Total Atoms On Each Side.

For purposes of looking at chemical equations, this means that the equation that describes the reaction has to be "balanced". In other words, there must be the same number and same kind of atoms on the reactant side of the equation as there are on the product side to ensure that no atoms are created or lost during the reaction.