Molar and molecular weight of Y2O3

• Molecular formula: Y2O3 or O3Y2
• Relative molecular weight of Y2O3: 225.8099
• Molar mass of Y2O3: 225.8099 g/mol (0.22581 kg/mol)

Calculation of the relative molecular and molar mass of Y2O3

• Mr[Y2O3] = Ar[O] * 3 + Ar[Y] * 2 = 15.9994 * 3 + 88.90585 * 2 = 225.8099
• Molar mass (kg/mol) = Mr[Y2O3] : 1000 = 225.8099 : 1000 = 0.22581 kg/mol

Y2O3: percent composition by element

• Oxygen (O) = 47.9982 : 225.8099 * 100 = 21.256 %
• Yttrium (Y) = 177.8117 : 225.8099 * 100 = 78.744 %

Molar mass calculator