Molar and molecular weight of MgCl2

• Molecular formula: MgCl2 or Cl2Mg
• Relative molecular weight of MgCl2: 95.211
• Molar mass of MgCl2: 95.211 g/mol (0.09521 kg/mol)

Calculation of the relative molecular and molar mass of MgCl2

• Mr[MgCl2] = Ar[Cl] * 2 + Ar[Mg] = 35.453 * 2 + 24.305 = 95.211
• Molar mass (kg/mol) = Mr[MgCl2] : 1000 = 95.211 : 1000 = 0.09521 kg/mol

MgCl2: percent composition by element

• Chlorine (Cl) = 70.906 : 95.211 * 100 = 74.472 %
• Magnesium (Mg) = 24.305 : 95.211 * 100 = 25.528 %

Molar mass calculator