把4.6g钠投入到95.4g水中，不考虑水的蒸发，所得溶液中溶质的质量分数是（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19975' and id < 1738095 and id<>'1738095' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19975' and id > 1738095 and id<>'1738095' order by id asc limit 5