题干

正常雨水偏酸性,pH约为5.6,这是因为大气中的 A气体溶于水的缘故.酸雨是指pH小于5.6的降水,主要是由人为排放的硫氧化物和氮氧化物等酸性气体转化而成的,发生的反应主要有:

①SO2+H2O═H2SO3      ②2H2SO3+O2═2H2SO4

③2NO+O2═2NO2(快速)   ④3NO2+H2O═2HNO3+NO

请回答下列有关问题:

(1)A气体的化学式为 ____  .

(2)上述四个化学反应中的所有物质中,属于酸的有____种.

(3)由③、④两个反应可知,NO2中的氮元素最终以 ____  (写化学式)物质形式存在.

上一题 下一题 0.0难度 选择题 更新时间:2018-01-14 06:01:53

答案(点此获取答案解析)

CO2,三,HNO3

同类题3

Chris Jones 刚刚结束了一次不寻常的印度之旅,记者就此对他进行了采访。以下是采访的部分内容:

Reporter: ____

Chris: Well, it all started two years ago when I was planning a trip to India, I visited  a photographic(摄影的) exhibition of elephants and I realized that the only way to travel around India was on an elephant.

Reporter: ____

Chris: I flew to New Delhi and started looking for an elephant. I needed an elephant trained to carry people. I asked an expert for help. He taught me how to ride an elephant. He also helped me find an elephant.

Reporter: ____

Chris: Not too long, I bought a female(母的) elephant called Tara for about USD 6, 000.

Reporter: ____

Chris: Tara and I set off from New Delhi a week later. We were heading to Sonepur in northern India. And what a ride! Elephants can travel at about 6 miles an hour and Sonepur was more than 1, 200 km away. It took us 64 days to complete the journey.

Reporter: ____

Chris: Yes, a few. But nothing serious. On the third day, Tara hurt her foot. But that got better quickly. Also, there was a lot of heavy rain during the first week and we got very wet!

请根据Chris Jones 的回答,从A、B、C、D、E、F六个选项中选择恰当的问题填入相应的五个空格中。

A. How long did it take to find a suitable elephant?

B. What gave you the idea to travel around India on an elephant?

C. Did you have any problems on your journey?

D. Can you tell me the journey?

E. What did you do next?

F. An unusual journey.