Question

what describes a chemical equation?
oa it is a representation of a chemical reaction.
ob it is the combination of reactants and products.
oc it is a balanced equation of reactants and products.
od it is a chemical change in which one or more reactants change into one or more products.

Explanation:

A chemical equation uses chemical formulas and symbols to represent a chemical reaction. Option B only mentions combination of reactants and products without the representation aspect. Option C - not all chemical equations are balanced initially (though we aim to balance them). Option D describes a chemical reaction itself, not the equation.

Answer:

A. It is a representation of a chemical reaction.