Molar and molecular weight of O2S

• Molecular formula: O2S or SO2
• Relative molecular weight of O2S: 64.0638
• Molar mass of O2S: 64.0638 g/mol (0.06406 kg/mol)

Calculation of the relative molecular and molar mass of O2S

• Mr[O2S] = Ar[O] * 2 + Ar[S] = 15.9994 * 2 + 32.065 = 64.0638
• Molar mass (kg/mol) = Mr[O2S] : 1000 = 64.0638 : 1000 = 0.06406 kg/mol

O2S: percent composition by element

• Oxygen (O) = 31.9988 : 64.0638 * 100 = 49.948 %
• Sulfur (S) = 32.065 : 64.0638 * 100 = 50.052 %

Molar mass calculator