问题
计算题
工业上采用氨的催化氧化法制取硝酸。用10.0吨氨制取63%的硝酸，设NH3的转化率为95%，NO转化为HNO3的产率为90%，则实际能得63%硝酸的质量为多少吨？
答案
50.29（t）
解：设能得63%硝酸的质量为x吨
因为：4NH3 +5O2 =" " 4NO + 6H2O 4NO+3O2 +2H2O=4HNO3。
搜题请搜索小程序“爱下问搜题”
工业上采用氨的催化氧化法制取硝酸。用10.0吨氨制取63%的硝酸，设NH3的转化率为95%，NO转化为HNO3的产率为90%，则实际能得63%硝酸的质量为多少吨？
50.29（t）
解：设能得63%硝酸的质量为x吨
因为：4NH3 +5O2 =" " 4NO + 6H2O 4NO+3O2 +2H2O=4HNO3。
摘录信息（共5小题；每小题1分，满分5分） 阅读下面短文，根据所读内容在文后第53至第57小题的空格里填上适当的单词或短语，并将答案转写到答题卡上。 注意：每空不超过3个单词。 This is News on the Hour, Ed Wilson reporting. News One: The president and First Lady will visit Africa on a good will tour in May. They plan to visit eight African countries. News Two: Reports from China say the Chinese want closer ties between China and the U.S. and Western Europe. A group of top Chinese scientists start its ten-nation tour next month. News Three: In news about health, scientists in California report findings of a relationship between the drinking of coffee and the increase of heart diseases among women. According to the report in the American Medical Journal, the five-year study shows that: women who drink more than two cups of coffee a day have a greater chance of having heart disease than women who do not. That’s the news of the hour. And now back to more easy listening with Jan Singer.
| ||||||||||||||||||||