在一密闭容器中,aA(g)bB(g)达到平衡后,保持温度不变,将容器体积

在一密闭容器中,aA(g)bB(g)达到平衡后,保持温度不变,将容器体积增大一倍,当达到新的平衡时,B的浓度是原来的60%,则

A.平衡向正反应方向移动了           B.物质A的转化率减小了

C.物质B的质量分数增大了          D. a>b

答案

AC

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