試卷名稱:114年 - 114 國立清華大學_學士後醫學系_自然科學組﹕物理化學#126266
年份:114年
科目:學士後西醫物理及化學
3. An unknown compound X was found to have molecular peak of m/z = 74 by mass spectrometry and a measured boiling point of 57°C at latm. Which of the following is most likely to be compound X?
(A) diethyl ether
(D) butanone
(B) methyl acetate
(E) n-pentane
(C) propionic acid