题目

在一定温度下,一定体积的密闭容器中有如下平衡:H2(g)+I2(g)2HI(g)。当H2和I2的起始浓度均为0.10 mol·L-1时,在平衡状态HI的浓度为0.16 mol·L-1。若H2和I2的起始浓度均为0.20 mol·L-1,则平衡时H2的浓度(mol·L-1)是(    )A.0.16             B.0.08               C.0.04               D.0.02 答案:解析:对于可逆反应H2(g)+I2(g)2HI(g),压强变化对平衡无影响,题目中两个不同的始态可形成“等效平衡”,也就是说,H2的转化率不变。答案:CThere were many people on the bus this morning. We didn’t have ______ to stand in.A. much space B. many spaces C. a lot space D. many space
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