Molar and molecular weight of Al2O

• Relative molecular weight of Al2O: 69.9624772
• Molar mass of Al2O: 69.9624772 g/mol (0.06996 kg/mol)

Calculation of the relative molecular and molar mass of Al2O

• Mr[Al2O] = Ar[Al] * 2 + Ar[O] = 26.9815386 * 2 + 15.9994 = 69.9624772
• Molar mass (kg/mol) = Mr[Al2O] : 1000 = 69.9624772 : 1000 = 0.06996 kg/mol

Al2O: percent composition by element

• Aluminum (Al) = 53.9630772 : 69.9624772 * 100 = 77.131 %
• Oxygen (O) = 15.9994 : 69.9624772 * 100 = 22.869 %

Molar mass calculator