Molar and molecular weight of CaSO3

• Molecular formula: CaSO3 or CaO3S
• Relative molecular weight of CaSO3: 120.1412
• Molar mass of CaSO3: 120.1412 g/mol (0.12014 kg/mol)

Calculation of the relative molecular and molar mass of CaSO3

• Mr[CaSO3] = Ar[Ca] + Ar[O] * 3 + Ar[S] = 40.078 + 15.9994 * 3 + 32.065 = 120.1412
• Molar mass (kg/mol) = Mr[CaSO3] : 1000 = 120.1412 : 1000 = 0.12014 kg/mol

CaSO3: percent composition by element

• Calcium (Ca) = 40.078 : 120.1412 * 100 = 33.359 %
• Oxygen (O) = 47.9982 : 120.1412 * 100 = 39.951 %
• Sulfur (S) = 32.065 : 120.1412 * 100 = 26.689 %

Molar mass calculator