Molar and molecular weight of HClO4

• Relative molecular weight of HClO4: 100.45854
• Molar mass of HClO4: 100.45854 g/mol (0.10046 kg/mol)

Calculation of the relative molecular and molar mass of HClO4

• Mr[HClO4] = Ar[H] + Ar[Cl] + Ar[O] * 4 = 1.00794 + 35.453 + 15.9994 * 4 = 100.45854
• Molar mass (kg/mol) = Mr[HClO4] : 1000 = 100.45854 : 1000 = 0.10046 kg/mol

HClO4: percent composition by element

• Hydrogen (H) = 1.00794 : 100.45854 * 100 = 1.003 %
• Chlorine (Cl) = 35.453 : 100.45854 * 100 = 35.291 %
• Oxygen (O) = 63.9976 : 100.45854 * 100 = 63.705 %

Molar mass calculator