题目内容
在一定条件下将1mol的CO和1mol H2O(g)放入恒容密闭容器中发生反应：CO(g)+H2O(g)
CO2(g)+H2(g)，达到平衡时测得CO2为0.4mol。此时抽出CO和H2O（g）各0.5mol，达到新平衡后，CO2的物质的量为
2021-09-17
A.小于0.4mol大于0.2mol
B.等于0.2mol
C.小于0.2mol
D.大于0.4mol
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