皮皮学，免费搜题
登录
搜题
【简答题】
工业上合成氨在一定条件下进行如下反应：N 2 （g）+3H 2 （g）?2NH 3 （g）△H=-92.44kJ/mol．其部分工艺流程如图1所示： （1）合成氨所需要的原料气中，氮气取自______，氢气来源于______． （2）对原料气进行净化处理的目的是______． （3）设备A的名称是______，设备B的名称是______． （4）在20～50Mpa时，工业合成氨选择在400-500℃的温度进行反应，主要原因是______． （5）据《科学》杂志报道，希腊化学家在常压下将氢气和用氢气稀释的氮气分别通入一个加热到570℃的电解池（如图2）中，氢和氮在电极上合成了氨，且转化率达到了78%．则：阳极反应为______，阴极反应为______．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】费孝通的代表作____________被认为是中国农村社区研究的代表作
【单选题】The Canadian investigators think that
A.
the ADR incidence figures from their research are surely very exact.
B.
the ADR incidence figures from their research are probably too high.
C.
the ADR incidence figures from their research are perhaps too low.
D.
None of the above is true.
【单选题】Tonnage tax is officially based upon the figures obtained from the ______.
A.
Admeasurement Certificate
B.
deadweight scale
C.
displacement scale
D.
Load Line Certificate
【单选题】Why are there four presidents on the monument instead of historical figures from the Old West?
A.
The artist thought the original subject was not important enough.
B.
The committee could not agree on which western figures to include.
C.
The rock found in the area was not suitable for such a carving.
D.
The artist thought carving historical figures would be controversial.
【单选题】下列各项不属于 原始凭证 审核的内容 ( )。
A.
凭证反映的内容是否真实
B.
凭证各项基本要素是否齐全
C.
会计科目的使用是否正确
D.
凭证是否有填制单位的公章
相关题目：