試題詳解

30. You take an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen) with a mass of 1.00 g，bum it in air, | and collect 2.20 g of carbon dioxide and 0.400 g water. The molar mass of aspirin is between 170 and 190 g/mol. The molecular E form of aspirin is c
(A) C₆H₈O₅
(B) C₉H₈O₄
(C)C₈H₁₀O₅
(D)C₁₀H₆O₄
(E) none of these