Question

How to balance a chemical equation?

Answer 1

To balance a chemical equation, the number of atoms on both the sides i.e on products side and on the reactants side , the no. of atoms should be equal on both the sides.
Hope it helps

Answer 2

Example: Zn + H2SO4 →   ZnSO4 + H2

The equation in which the number of atoms or molecules is equal on both sides of the equation is known as balanced chemical equation. In the equation given above, the number of zinc, hydrogen and sulphate are equal on both sides; therefore, it is an example of balanced chemical equation.