Answer:
The answer to your question is: PCl₃
Explanation:
Data
P = 10.15 mg
Cl = 34.85 mg
Convert mg to moles
31 mg of P ----------------- 1 mmol
10.15 mg ------------------ x
x = 0.327 mmol of P
35.5 mg of Cl ------------ 1 mmol
34.85 mg ----------------- x
x = 0.982 mmol of Cl
Divide by the lowest number of mmoles
For P = 0.327 / 0.327 = 1
For Cl = 0.982 / 0.327 = 3
Empirical formula
PCl₃
