Question

explain why chemical equations must be balanced

Answer 1

To make sure that the equation conforms to the law of conservation of mass the equation must be balanced. A balanced chemical equation is one where there are the same number of atoms of each element on either side of the equation. This is the significance of the numbers written before each compound in the reaction.

Answer 2

according to the law of conservation of mass,the total mass of the products formed in a chemical reaction must be equal to the mass of reactants consumed.to equalize the reactants and products we must balance a chemical reaction.