Molar and molecular weight of Mn2O7

• Relative molecular weight of Mn2O7: 221.87189
• Molar mass of Mn2O7: 221.87189 g/mol (0.22187 kg/mol)

Calculation of the relative molecular and molar mass of Mn2O7

• Mr[Mn2O7] = Ar[Mn] * 2 + Ar[O] * 7 = 54.938045 * 2 + 15.9994 * 7 = 221.87189
• Molar mass (kg/mol) = Mr[Mn2O7] : 1000 = 221.87189 : 1000 = 0.22187 kg/mol

Mn2O7: percent composition by element

• Manganese (Mn) = 109.87609 : 221.87189 * 100 = 49.522 %
• Oxygen (O) = 111.9958 : 221.87189 * 100 = 50.478 %

Molar mass calculator