Molar and molecular weight of HgCl2

• Molecular formula: HgCl2 or Cl2Hg
• Relative molecular weight of HgCl2: 271.496
• Molar mass of HgCl2: 271.496 g/mol (0.2715 kg/mol)

Calculation of the relative molecular and molar mass of HgCl2

• Mr[HgCl2] = Ar[Cl] * 2 + Ar[Hg] = 35.453 * 2 + 200.59 = 271.496
• Molar mass (kg/mol) = Mr[HgCl2] : 1000 = 271.496 : 1000 = 0.2715 kg/mol

HgCl2: percent composition by element

• Chlorine (Cl) = 70.906 : 271.496 * 100 = 26.117 %
• Mercury (Hg) = 200.59 : 271.496 * 100 = 73.883 %

Molar mass calculator