把 氯化钠溶于 水中,所得溶液的溶质质量分数为(单位 ):
Answer and explanation
Correct answer: B.
其他选项为什么不对: 代入检验,、、都与算出的 不符。
- Step 1: 溶液质量 。
- Step 2: 质量分数 。
Answer
.
Practise more 物质的量.
Free questions with an explanation for every one, and full timed Gaokao mock tests.
Correct answer: B.
Free questions with an explanation for every one, and full timed Gaokao mock tests.