下列关于1.0 mol/L Na 2 SO 4 溶液的叙述正确的是( ) 1溶液中含有1mol Na 2 SO 4 21L溶液中含有142g Na 2 SO 4 3将1mol Na 2 SO 4 溶于1mol水中所得的溶液 4将322g Na 2 SO 4 .10H 2 O 溶于水后再稀释成1 000mL所得的溶液
【简答题】A.He will choose a new topic to write the essay. B.He will choose the novel written by Shakespeare as the topic. C.He refuses to accept the man's advice. D.He is on the wrong track.