Molar and molecular weight of FeSO4

• Molecular formula: FeSO4 or FeO4S
• Relative molecular weight of FeSO4: 151.9076
• Molar mass of FeSO4: 151.9076 g/mol (0.15191 kg/mol)

Calculation of the relative molecular and molar mass of FeSO4

• Mr[FeSO4] = Ar[Fe] + Ar[O] * 4 + Ar[S] = 55.845 + 15.9994 * 4 + 32.065 = 151.9076
• Molar mass (kg/mol) = Mr[FeSO4] : 1000 = 151.9076 : 1000 = 0.15191 kg/mol

FeSO4: percent composition by element

• Iron (Fe) = 55.845 : 151.9076 * 100 = 36.762 %
• Oxygen (O) = 63.9976 : 151.9076 * 100 = 42.129 %
• Sulfur (S) = 32.065 : 151.9076 * 100 = 21.108 %

Molar mass calculator