When the equation KClO3(s) KCl(s) O2(g) is balanced the coefficient of KClO3 is .?

To balance the equation ( \text{KClO}_3(s) \rightarrow \text{KCl}(s) + \text{O}_2(g) ), we need to ensure that the number of each type of atom is equal on both sides. The balanced equation is ( 2 \text{KClO}_3(s) \rightarrow 2 \text{KCl}(s) + 3 \text{O}_2(g) ). Therefore, the coefficient of ( \text{KClO}_3 ) is 2.