Molar and molecular weight of Cu2S

• Relative molecular weight of Cu2S: 159.157
• Molar mass of Cu2S: 159.157 g/mol (0.15916 kg/mol)

Calculation of the relative molecular and molar mass of Cu2S

• Mr[Cu2S] = Ar[Cu] * 2 + Ar[S] = 63.546 * 2 + 32.065 = 159.157
• Molar mass (kg/mol) = Mr[Cu2S] : 1000 = 159.157 : 1000 = 0.15916 kg/mol

Cu2S: percent composition by element

• Copper (Cu) = 127.092 : 159.157 * 100 = 79.853 %
• Sulfur (S) = 32.065 : 159.157 * 100 = 20.147 %

Molar mass calculator