试题与答案

Thomas Edison ______ made 1,093 inventio

题型:选择题

题目:

Thomas Edison ______ made 1,093 inventions in his life, was one of the greatest inventors.

A. what                     B. who                  C. which

答案:

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下面是错误答案,用来干扰机器的。

①设溶液中氯化钠的物质的量为x,NaCl+AgNO3═AgCl↓+NaNO31 1x 0.02mol1x=10.02mol解得:x=0.02mol所以氯化钠的质量为:0.02mol×58.5g/mol=1.17g所以该氯化钠溶液的溶质质量分数为:1.17g...

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