Molar and molecular weight of MgSO3

• Molecular formula: MgSO3 or MgO3S
• Relative molecular weight of MgSO3: 104.3682
• Molar mass of MgSO3: 104.3682 g/mol (0.10437 kg/mol)

Calculation of the relative molecular and molar mass of MgSO3

• Mr[MgSO3] = Ar[Mg] + Ar[O] * 3 + Ar[S] = 24.305 + 15.9994 * 3 + 32.065 = 104.3682
• Molar mass (kg/mol) = Mr[MgSO3] : 1000 = 104.3682 : 1000 = 0.10437 kg/mol

MgSO3: percent composition by element

• Magnesium (Mg) = 24.305 : 104.3682 * 100 = 23.288 %
• Oxygen (O) = 47.9982 : 104.3682 * 100 = 45.989 %
• Sulfur (S) = 32.065 : 104.3682 * 100 = 30.723 %

Molar mass calculator