Molar and molecular weight of SO2

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

Calculation of the relative molecular and molar mass of SO2

• Mr[SO2] = Ar[O] * 2 + Ar[S] = 15.9994 * 2 + 32.065 = 64.0638
• Molar mass (kg/mol) = Mr[SO2] : 1000 = 64.0638 : 1000 = 0.06406 kg/mol

SO2: 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