Molar and molecular weight of O2

• Relative molecular weight of O2: 31.9988
• Molar mass of O2: 31.9988 g/mol (0.032 kg/mol)

Calculation of the relative molecular and molar mass of O2

• Mr[O2] = Ar[O] * 2 = 15.9994 * 2 = 31.9988
• Molar mass (kg/mol) = Mr[O2] : 1000 = 31.9988 : 1000 = 0.032 kg/mol

Molar mass calculator