Molar and molecular weight of As2O5

• Relative molecular weight of As2O5: 229.8402
• Molar mass of As2O5: 229.8402 g/mol (0.22984 kg/mol)

Calculation of the relative molecular and molar mass of As2O5

• Mr[As2O5] = Ar[As] * 2 + Ar[O] * 5 = 74.9216 * 2 + 15.9994 * 5 = 229.8402
• Molar mass (kg/mol) = Mr[As2O5] : 1000 = 229.8402 : 1000 = 0.22984 kg/mol

As2O5: percent composition by element

• Arsenic (As) = 149.8432 : 229.8402 * 100 = 65.195 %
• Oxygen (O) = 79.997 : 229.8402 * 100 = 34.805 %

Molar mass calculator