题目:
在密闭容器中,下列可逆反应均已经达到平衡。当增大压强后,平衡体系中的混合气体的平均相对分子量质量不增加的反应是( )
A.2NO2(g)N2O4(g)
B.4NH3(g)+5O2(g)4NO(g)+6H2O(g)
C.2HBr(g)H2(g)+Br2(g)
D.CO(g)+2H2(g)CH3OH(g)
答案:
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