Molar and molecular weight of CaSO4

• Molecular formula: CaSO4 or CaO4S
• Relative molecular weight of CaSO4: 136.1406
• Molar mass of CaSO4: 136.1406 g/mol (0.13614 kg/mol)

Calculation of the relative molecular and molar mass of CaSO4

• Mr[CaSO4] = Ar[Ca] + Ar[O] * 4 + Ar[S] = 40.078 + 15.9994 * 4 + 32.065 = 136.1406
• Molar mass (kg/mol) = Mr[CaSO4] : 1000 = 136.1406 : 1000 = 0.13614 kg/mol

CaSO4: percent composition by element

• Calcium (Ca) = 40.078 : 136.1406 * 100 = 29.439 %
• Oxygen (O) = 63.9976 : 136.1406 * 100 = 47.008 %
• Sulfur (S) = 32.065 : 136.1406 * 100 = 23.553 %

Molar mass calculator