2Na+2H2O→xNaOH+H2
The value of x is:
2
Keeping in mind that a balanced chemical equation has equal number of atoms of each element equal on both sides, let us balance the equation given.
Since there are 2 atoms of sodium on the reactants side, filling a 2 in place of x balances the given equation because it balances the number of atoms of hydrogen and oxygen atoms on both sides.
i.e., 2Na+2H2O→2NaOH+H2
The value of x is 2.