Molar and molecular weight of P4O8

• Molecular formula: P4O8 or O8P4
• Relative molecular weight of P4O8: 251.890248
• Molar mass of P4O8: 251.890248 g/mol (0.25189 kg/mol)

Calculation of the relative molecular and molar mass of P4O8

• Mr[P4O8] = Ar[O] * 8 + Ar[P] * 4 = 15.9994 * 8 + 30.973762 * 4 = 251.890248
• Molar mass (kg/mol) = Mr[P4O8] : 1000 = 251.890248 : 1000 = 0.25189 kg/mol

P4O8: percent composition by element

• Oxygen (O) = 127.9952 : 251.890248 * 100 = 50.814 %
• Phosphorus (P) = 123.895048 : 251.890248 * 100 = 49.186 %

Molar mass calculator