Molar and molecular weight of P2O5

• Relative molecular weight of P2O5: 141.944524
• Molar mass of P2O5: 141.944524 g/mol (0.14194 kg/mol)

Calculation of the relative molecular and molar mass of P2O5

• Mr[P2O5] = Ar[P] * 2 + Ar[O] * 5 = 30.973762 * 2 + 15.9994 * 5 = 141.944524
• Molar mass (kg/mol) = Mr[P2O5] : 1000 = 141.944524 : 1000 = 0.14194 kg/mol

P2O5: percent composition by element

• Phosphorus (P) = 61.947524 : 141.944524 * 100 = 43.642 %
• Oxygen (O) = 79.997 : 141.944524 * 100 = 56.358 %

Molar mass calculator