Molar and molecular weight of Cu2Se

• Relative molecular weight of Cu2Se: 206.052
• Molar mass of Cu2Se: 206.052 g/mol (0.20605 kg/mol)

Calculation of the relative molecular and molar mass of Cu2Se

• Mr[Cu2Se] = Ar[Cu] * 2 + Ar[Se] = 63.546 * 2 + 78.96 = 206.052
• Molar mass (kg/mol) = Mr[Cu2Se] : 1000 = 206.052 : 1000 = 0.20605 kg/mol

Cu2Se: percent composition by element

• Copper (Cu) = 127.092 : 206.052 * 100 = 61.68 %
• Selenium (Se) = 78.96 : 206.052 * 100 = 38.32 %

Molar mass calculator