Molar and molecular weight of H2O2

• Molecular formula: H2O2 or HOOH
• Relative molecular weight of H2O2: 34.01468
• Molar mass of H2O2: 34.01468 g/mol (0.03401 kg/mol)

Calculation of the relative molecular and molar mass of H2O2

• Mr[H2O2] = Ar[H] * 2 + Ar[O] * 2 = 1.00794 * 2 + 15.9994 * 2 = 34.01468
• Molar mass (kg/mol) = Mr[H2O2] : 1000 = 34.01468 : 1000 = 0.03401 kg/mol

H2O2: percent composition by element

• Hydrogen (H) = 2.01588 : 34.01468 * 100 = 5.926 %
• Oxygen (O) = 31.9988 : 34.01468 * 100 = 94.074 %

Molar mass calculator