Molar and molecular weight of Fe3O4

• Relative molecular weight of Fe3O4: 231.5326
• Molar mass of Fe3O4: 231.5326 g/mol (0.23153 kg/mol)

Calculation of the relative molecular and molar mass of Fe3O4

• Mr[Fe3O4] = Ar[Fe] * 3 + Ar[O] * 4 = 55.845 * 3 + 15.9994 * 4 = 231.5326
• Molar mass (kg/mol) = Mr[Fe3O4] : 1000 = 231.5326 : 1000 = 0.23153 kg/mol

Fe3O4: percent composition by element

• Iron (Fe) = 167.535 : 231.5326 * 100 = 72.359 %
• Oxygen (O) = 63.9976 : 231.5326 * 100 = 27.641 %

Molar mass calculator