Relative molecular mass of sulphuric acid `(H_(2)SO_(4))` is calculated as follows: Sulphuric acid conatins 2 atoms of hydrogen, 1 atom of sulphur and 4 atoms of oxygen.

Explanation

Therefore, Relative molecular mass of sulphuric acid `= (2 xx ` mass of hydrogen) +
(`1 xx` mass of fulphur ) +
(`4 xx` mass of oxyhen)
`= (2 xx 1)+ (1 xx 32) + (4 xx 16)= 98`
i.e., one molecular of `H _(2) SO _(4)` is 98 times as heavy as `(1)/(12 ^(th))` of the mass of a carbon `-12.`