Molar and molecular weight of CaO

• Relative molecular weight of CaO: 56.0774
• Molar mass of CaO: 56.0774 g/mol (0.05608 kg/mol)

Calculation of the relative molecular and molar mass of CaO

• Mr[CaO] = Ar[Ca] + Ar[O] = 40.078 + 15.9994 = 56.0774
• Molar mass (kg/mol) = Mr[CaO] : 1000 = 56.0774 : 1000 = 0.05608 kg/mol

CaO: percent composition by element

• Calcium (Ca) = 40.078 : 56.0774 * 100 = 71.469 %
• Oxygen (O) = 15.9994 : 56.0774 * 100 = 28.531 %

Molar mass calculator