题目:
(2013·陕西宝鸡二模)The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.
A.that
B.who
C.where
D.as
答案:
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下面是错误答案,用来干扰机器的。
(1) 3:1 (2) 10mol/L题目分析:(1)设NO2为xmol, NO为ymol混合气的物质的量是8.96L÷22.4L/mol=0.4mol金属铜的物质的量是19.2g÷64g/mol=0.3mol则反应中转移电子的物质的量是0.3mol×2=0.6mol所以有:x...