Answer to Question #134374 in General Chemistry for si

Question

The analysis of a compound gives the following percent composition by mass:

C: 54.30 percent; H: 9.495 percent; S: 12.08 percent; O: 24.12 percent. What is its molecular formula given that its molar mass is 265.4 g?

Answer 1

C: H: S: O = 54.30/12 : 9.495/1 : 12.08/32 : 24.12/16

          = 4.525 : 9.495 : 0.3775 : 1.5075

          = 12 : 25 : 1 : 4

The empirical formula of the compound is C₁₂H₂₅SO₄

According to question

(C₁₂H₂₅SO₄)n = 265.4

(12×12+1×25+32×1+16×4)n =265.4

265n = 265.4

n = 1(approx)

Formula of the compound is C₁₂H₂₅SO₄ (Answer)