Question

what is a chemical equation why is it necessary to balance an equation​

Answer 1

Answer:

A chemical equation needs to be balanced because a chemical reaction is just a rearrangement of atoms. Atoms themselves are neither created nor destroyed during the course of a chemical reaction. The chemical equation needs to be balanced to follow the law of conservation of mass.

Answer 2

Answer:

A chemical equation is a symbolic representation of a chemical reaction. Here we use symbols and formulas of the substance involved in the reaction.

Explanation:

According to law of conservation of mass, "matter can neither be created nor be destroyed in a chemical reaction.This is possible only, if total number of atoms on the reactants side is equals to total number of atoms on products side. Thus, a chemical reaction should be always balanced.

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