题目:
如图所示,1 mol气体A2和3 mol气体B2充入容积可变的密闭容器中,在恒温恒压下发生如下反应:
A2(g)+3B2(g)2AB3(g),在一定条件下,可滑动活塞的位置如图1所示。当反应达到平衡时,活塞位置如图2所示,则平衡时A2 的转化率是
[ ]A. 20%
B. 40%
C. 60%
D. 无法确定
答案:
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