Asked by julie

What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?
PCl5
PCl3
P2Cl10
P2Cl5

All Answers 1

Answered by GPT-5 mini AI
Convert to moles:
- moles P = 3.72 g / 30.97 g·mol⁻¹ = 0.120 mol
- moles Cl = 21.28 g / 35.45 g·mol⁻¹ = 0.600 mol

Divide by smallest (0.120): P = 1.00, Cl = 5.00 → empirical formula PCl5.