In an experiment, 4.14 g of phosphorus combined with chlorine to produce 27.8 g of a white solid compound. what is the empirical formula of the compound?

Grams of Phosphorus = 4.14 grams

Grams of white compound = 27.8 grams

Grams of Chlorine would be = 27.8 - 4.14 = 23.66 grams

Calculating moles which would be grams / molar mass

Molar mass of P = 30.97 grams / moles; Molar mass of Cl = 35.45 grams / moles

Moles of Phosphorus = 4.14 grams / 30.97 grams / moles = 0.1337 moles

Moles of Chlorine = 23.66 grams / 35.45 grams / moles = 0.6674 moles

Calculating the ratios by dividing with the small entity

P = 0.1337 moles / 0.1337 moles = 1

Cl = 0.6674 moles / 0.1337 moles = 5

So the empirical formula would be PCl5