Molar and molecular weight of Cu2O

• Relative molecular weight of Cu2O: 143.0914
• Molar mass of Cu2O: 143.0914 g/mol (0.14309 kg/mol)

Calculation of the relative molecular and molar mass of Cu2O

• Mr[Cu2O] = Ar[Cu] * 2 + Ar[O] = 63.546 * 2 + 15.9994 = 143.0914
• Molar mass (kg/mol) = Mr[Cu2O] : 1000 = 143.0914 : 1000 = 0.14309 kg/mol

Cu2O: percent composition by element

• Copper (Cu) = 127.092 : 143.0914 * 100 = 88.819 %
• Oxygen (O) = 15.9994 : 143.0914 * 100 = 11.181 %

Molar mass calculator