試題詳解

57. A sample of compound X is subjected to elemental analysis and the following percentages by weight are found: 39.97% C, 6.73% H, and 53.30% O. The molecular weight of X is 90. What is the empirical formula of X?
(A) C₆H₈O
(B) C₂H₄O₂
(C) C₄H₁₀O₂
(D) C₃H₆O₃
(E) CH₂O