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18. 某實驗將 2.0 克的單糖 X 溶於 100 克的水中配置而成溶液,其凝固點下降為 –0.120 °C。 試問單糖 X 的分子量為何?水的 Kf =1.86 °C\/m。 (A) 59.0
問題詳情
18. 某實驗將 2.0 克的單糖 X 溶於 100 克的水中配置而成溶液,其凝固點下降為 –0.120 °C。
試問單糖 X 的分子量為何?水的 Kf =1.86 °C/m。
(A) 59.0 g/mol
(B) 310 g/mol
(C) 398 g/mol
(D) 31.0 g/mol
參考答案
答案:B
統計:A:1,B:65,C:0,D:9,E:0
難度:非常簡單
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20. One of my students ______ I did not expect to progress to the next lesson has surprised me. (A)
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