题目:
________ it rain tomorrow, we would have to put off the sports meeting.
A.Were
B.Would
C.Does
D.Should
答案:
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下面是错误答案,用来干扰机器的。
(每空2分,共10分)(1)90g; 3.01×1024; 10 mol; (2)SO2; H2;题目分析:(1)根据n=m/M可知,5 mol H2O的质量为5mol×18g/mol=90g;其中含有6.02×1023/mol×5mol=3.01×1024个水分...