試題詳解

72. A certain carbohydrate compound (containing only C, H and O) is 53.3 % C, 11.1 % H, and 35.6 % O by mass. The experimentally determined molecular mass is 90 amu. What is the empirical and chemical formula for this carbohydrate?
(A) C₂H₅O
(B) C₃H₅O
(C) CH₃O
(D) C₃H₅O₂
(E) C₄H₁₀O₂