Why the equation is balanced give reason?

Answer 1

A chemical equation is balanced when the same total number of each kind of atomic symbol occurs on both the reactants and the products side of the equation, after:

1. finding the explicit numbers of each kind of atomic symbol by multiplying each occurrence of the symbol by any subscript number immediately following the atomic symbol;

2. multiplying the explicit numbers, as determined in step 1, of each kind of symbol, if any, that occurs between parentheses by the subscript at the end of the parentheses;

3. multiplying the resulting products of multiplication from step 1 as modified by step 2, if any are so modified, by the value of any coefficient that occurs in the equation before a chemical formula for the atomic symbols within that formula; and

4. adding all instance of each atomic symbol as multiplied by these operations to the number one for each instance of an atomic symbol that is not modified by either of steps 2 or 3; and

5. collecting the sums from step 4 separately for each kind of atomic symbol to determine whether the numbers are the same for both reactants and products for each atomic symbol.