Molar and molecular weight of Al2O3

• Relative molecular weight of Al2O3: 101.9612772
• Molar mass of Al2O3: 101.9612772 g/mol (0.10196 kg/mol)

Calculation of the relative molecular and molar mass of Al2O3

• Mr[Al2O3] = Ar[Al] * 2 + Ar[O] * 3 = 26.9815386 * 2 + 15.9994 * 3 = 101.9612772
• Molar mass (kg/mol) = Mr[Al2O3] : 1000 = 101.9612772 : 1000 = 0.10196 kg/mol

Al2O3: percent composition by element

• Aluminum (Al) = 53.9630772 : 101.9612772 * 100 = 52.925 %
• Oxygen (O) = 47.9982 : 101.9612772 * 100 = 47.075 %

Molar mass calculator