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原子量:H—1 C—12 O—16 Na—23 Mg—24 Al—27 S—32 Cl——35.5 K—39 Fe—56 Zn—65 Ba—137 一、选择题 1.检验某乙醇样品中是否含有少量水分,最简便可行的方法是选用( )。 A、无水硫酸铜 B.浓硫酸 C.苛性钠固体 D.生石灰
Atomic weight: H—1 C—12 O—16 Na—23 Mg—24 Al—27 S—32 Cl—35.5 K—39 Fe—56 Zn—65 Ba—137 First, multiple-choice questions 1. Testing an ethanol sample Whether it contains a small amount of water, the easiest and most practical method is to use (). A. Anhydrous copper sulfate B. Concentrated sulfuric acid C. Caustic soda solid D. Quicklime