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

FREE Expert Solution

mass percent=mass elementtotal mass of compound×100


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=mass Pmass PCl5×100%P=30.974 gmol208.224 gmol×100

 %P = 14.88%

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Problem Details

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

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