Question

why should we balance a chemical equation

Answer 1

we balance a chemical equation in order to obey the law of conservation of mass

therefore the elements in both the sides of the reaction should contain same no of elements 

Answer 2

heya..

here is you answer..

All the chemical equations must be balanced.

Because items or neither created nor destroyed in the chemical reaction that means the total number of atoms of different elements on their reactant side must be equal to the same as productant side.

It may help you...☺☺