# Problem: Calculate the mass percent composition of each constituent element of phosphorus pentachloride.

###### FREE Expert Solution

phosphorus pentachloride: PCl5

molar mass P = 30.974 g/mol

molar mass Cl = 35.45 g/mol

molar mass PCl5 = (30.974 g/mol x 1) + (35.45 g/mol x 5)

molar mass PCl5 = 208.224 g/mol

Mass percent of P:

total mass P = 30.974 g/mol x 1

total mass P = 30.974 g/mol

%P = 14.88%

89% (5 ratings) ###### Problem Details

Calculate the mass percent composition of each constituent element of phosphorus pentachloride.

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