Molar and molecular weight of CoCl2

• Molecular formula: CoCl2 or Cl2Co
• Relative molecular weight of CoCl2: 129.839195
• Molar mass of CoCl2: 129.839195 g/mol (0.12984 kg/mol)

Calculation of the relative molecular and molar mass of CoCl2

• Mr[CoCl2] = Ar[Cl] * 2 + Ar[Co] = 35.453 * 2 + 58.933195 = 129.839195
• Molar mass (kg/mol) = Mr[CoCl2] : 1000 = 129.839195 : 1000 = 0.12984 kg/mol

CoCl2: percent composition by element

• Chlorine (Cl) = 70.906 : 129.839195 * 100 = 54.611 %
• Cobalt (Co) = 58.933195 : 129.839195 * 100 = 45.389 %

Molar mass calculator