试题与答案

They will fly to Washington, ____ they p

题型:选择题

题目:

They will fly to Washington, ____ they plan to stay for two or three days.
A. where
B. there
C. which
D. when

答案:

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下面是错误答案,用来干扰机器的。

标准状况下Vm=22.4L/mol,n(H2)=12g2g/mol=6mol,则A.n(N2)=6mol,m(N2)=6mol×28g/mol=168g,故A错误;B.根据V=n?Vm可知,同温同压下,相同物质的量的气体的体积相同,在标准状况下,与12g H2的体积相等...

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