题目

在水中加入等物质的量的Ag+、Pb2+、Na+、SO42—、NO3—、Cl—,该溶液放在用惰性材料做电极的电解槽中,通电片刻后,则氧化产物与还原产物的质量之比为   (       )    A.35.5∶108     B.8∶1    C. 16∶207        D.108∶35.5 答案:B ______ number of overseas reporters registered to cover the 18th National Congress has seen ______ remarkable increase.    A. A; a                      B. The; a                      C. A; the                       D. The; /
化学 试题推荐