Molar mass is the mass (in grams) per mole (6.02 x 10 ^ 23 particles) of a substance. The molar mass of a substance is calculated by finding the sum off all the atomic masses of every atom that is a part of a substance.
The formula unit for sulfuric acid is H2SO4. Therefore, its molar mass would be calculated as below:
2 H = 2 x 1.01 = 2.02 g/ mol `H_(2)`
1 S = 32.1 g /mol S
4 O = 4 x 16.0 = 64.0 g / mol O
2.02 + 32.1 + 64.0 = 98.12 grams / mole H2SO4 (or close to, depending on how one rounds each of the atomic masses used within the calculation)
The molecular formula for diatomic oxygen is O2. Therefore, its molar mass would be:
2 x 16.0 = 32.0 grams / mole O2