The total sum of the masses of the atoms or elements present in the molecule is termed as molecular weight.
To calculate the molecular weight of a compound we need to add the mass of individual atoms present in the molecule.
Molar mass of H2SO4
Look for the atomic masses of hydrogen, sulfur and oxygen.
H = 1.008
S = 32.06
O = 16
Therefore, the molar mass of H2SO4 is
=2(1.008) + 32.06 + 4(16)
Hence, molecular weight of H2SO4 is 98.08 g/mol.