Molar and molecular weight of HClO3

• Molecular formula: HClO3 or HOClO2
• Relative molecular weight of HClO3: 84.45914
• Molar mass of HClO3: 84.45914 g/mol (0.08446 kg/mol)

Calculation of the relative molecular and molar mass of HClO3

• Mr[HClO3] = Ar[H] + Ar[Cl] + Ar[O] * 3 = 1.00794 + 35.453 + 15.9994 * 3 = 84.45914
• Molar mass (kg/mol) = Mr[HClO3] : 1000 = 84.45914 : 1000 = 0.08446 kg/mol

HClO3: percent composition by element

• Hydrogen (H) = 1.00794 : 84.45914 * 100 = 1.193 %
• Chlorine (Cl) = 35.453 : 84.45914 * 100 = 41.977 %
• Oxygen (O) = 47.9982 : 84.45914 * 100 = 56.83 %

Molar mass calculator