問題詳情
38. A pure sample of (S)-phenylalanine has a specific rotation of +70o. A mixture of the two enantiomers of phenylalanine givesa specific rotation of -7.0o. What are the percentages of the S and R enantiomers in the mixture?
(A) 75 % S, 25 % R
(B) 65 % S, 35 % R
(C) 55 % S, 45 % R
(D) 45 % S, 55 % R
(E) 35 % S, 65 % R
參考答案
答案：D
難度：簡單0.75
統計：A(0),B(0),C(1),D(3),E(0)