Molar and molecular weight of PCl5

• Molecular formula: PCl5 or Cl5P
• Relative molecular weight of PCl5: 208.238762
• Molar mass of PCl5: 208.238762 g/mol (0.20824 kg/mol)

Calculation of the relative molecular and molar mass of PCl5

• Mr[PCl5] = Ar[Cl] * 5 + Ar[P] = 35.453 * 5 + 30.973762 = 208.238762
• Molar mass (kg/mol) = Mr[PCl5] : 1000 = 208.238762 : 1000 = 0.20824 kg/mol

PCl5: percent composition by element

• Chlorine (Cl) = 177.265 : 208.238762 * 100 = 85.126 %
• Phosphorus (P) = 30.973762 : 208.238762 * 100 = 14.874 %

Molar mass calculator