题目内容

相同质量摩尔浓度的下列物质的稀水溶液，沸点最低的是（）

A. HAc
B. 乙醇
C. KCl
D. MgCl2

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浓度相同的蔗糖、HAc、NaCl和Na2SO4水溶液，其中沸点最高的是（）

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