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下列可用于验证铜,铁,锌三种金属的活动性强弱的一组药品是()1.Cu,Zn,FeSO4溶液2.Cu,Fe,ZnSO4溶液3.Zn,FeSO4溶液,CuSO4溶液4.Fe,CuSO4溶液,ZnSO4溶液A.1,4B.1,2C.2,3D.3,4你选哪个???为什么???讲解一下~某样品6.5克与足量稀硫酸完全反应后产生氢气0.195克.则其所含杂质可能是()A.FeB.M ...
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