氢气在氧气中完全燃烧:。 氢气完全反应,生成水的质量为:
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: 氢气的物质的量 。
- Step 2: 由方程式,,质量 。
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.