A:1 mol硫酸钾中阴离子所带电荷数为NA
B:乙烯(C2H4)和环丙烷(C3H6)组成的28 g混合气体中含有2NA个氢原子
C:1mol Na2O2固体中含有NA个
D:将含0.1 mol氯化铁的饱和溶液滴加到沸水中可制取0.1NA个 Fe(OH)3胶体微粒
若河水的流速大小为3m/s,船在静水中的速度大小为4m/s,河宽为120m,则下列说法正确的是( )
如图为肺泡内的气体交换示意图.下列相关叙述不正确的( )
I think the scene of the movie is beautiful .what about you? .Which answer isn't right?