合成氨厂通过测定反应前后气体的密度来确定氮气的转化率。某工厂

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问题填空题

合成氨厂通过测定反应前后气体的密度来确定氮气的转化率。某工厂测得合成塔中氮气和氢气混合气体的密度为0.5536g/L（标准状况），从合成塔出来的混合气体在相同条件下密度为0.693g/L。则该合成氨厂氮气的转化率为？

答案

25%

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单词拼写（共10小题；每小题0.5分，满分5分）

根据下列句子及所给单词的首字母，在横线上写出各单词的正确形式。

1.I was b__________ by the dog yesterday.

2.He went through the forest under the p__________ of his dog.

3.Ancient people h__________ for food.

4.Geography a__________ people’s ways of living.

5.Orange juice c__________ vitamin.

6.They were so popular that their fans formed clubs ino order to get more f___with them.

7.The doctor is p__________ an operation now.

8.How much did you e__________ last month？

9.The flowers are s__________to temperature, so we must take good care of them.

10.He p___________ to be doing his homework when his mother came into his room.

问答题

燃烧需要具备什么条件？发生火灾时，一般用水来扑灭，水灭火的原理是什么？