Question

what is balance chemical equation

Answer 1

A equation in which number of atom of each elements in both side of equation is equall is called balanced chemical equation

Answer 2

A chemical equation(s) which follow the Law of Conservation of Mass is called Balanced Chemical Equation .
           
                                               OR

Chemical Equations in which no of atoms of an element before reaction is same as no of atoms after reaction .


e.g. :   Mg + $O_{2}$      →     MgO    ( Unbalanced )
          2Mg + $O_{2}$     →    2MgO    (Balanced )