Molar and molecular weight of H3PO2

• Molecular formula: H3PO2 or H3O2P
• Relative molecular weight of H3PO2: 65.996382
• Molar mass of H3PO2: 65.996382 g/mol (0.066 kg/mol)

Calculation of the relative molecular and molar mass of H3PO2

• Mr[H3PO2] = Ar[H] * 3 + Ar[O] * 2 + Ar[P] = 1.00794 * 3 + 15.9994 * 2 + 30.973762 = 65.996382
• Molar mass (kg/mol) = Mr[H3PO2] : 1000 = 65.996382 : 1000 = 0.066 kg/mol

H3PO2: percent composition by element

• Hydrogen (H) = 3.02382 : 65.996382 * 100 = 4.582 %
• Oxygen (O) = 31.9988 : 65.996382 * 100 = 48.486 %
• Phosphorus (P) = 30.973762 : 65.996382 * 100 = 46.933 %

Molar mass calculator