A:标准状况下,22.4L水含有NA个水分子
B:氧气和臭氧的混合物32 g中含有NA个氧原子
C:7.8 g Na2O2与水反应时转移0.1NA个电子
D:11.2 L氯气中含有NA个氯原子
如图为眼球的基本结构简图,请据图回答:
— I think travelling by train is more comfortable than travelling by plane.—_________. In my opinion, travelling by plane is more comfortable.
同学们从山上采集到一种石灰石,他们取80g该样品进行煅烧实验(所含杂质在煅烧过程中不发生变化),反应结束后剩余固体的质量为75.6g.