How many different elements are in our bodies? How many elements have an atomic number of 42? How are chemical elements formed? What is the percent composition of CO2? What is the percent composition of sodium chloride? What percent of the atmosphere is made of trace gases?
The percentage of nitrogen in the air we breathe is 78 percent. This means that the vast majority of the atmosphere we breathe is nitrogen, with...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your toug...
___mentioned above,the atmosphere mainly consists of nitrogen and oxygen. A.As was B.As it was C.What was D.It was 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 A是正确选项A是“如上所诉”的固定搭配,但不像1搂说的,as绝对不是做主语.该句子的主语是the atmosphere.B...
Nitrogenexists organically in the atmosphere, and actually composes around 75% of the air that humans and animals breathe every day. But the colorless and odorless gas is only safe to inhale when it is mixed with an appropriate concentration of oxygen; otherwise, breathing it ...
Living things require nitrogen for their cells to function and, furthermore, we are virtually steeping in the stuff since our atmosphere is made up of 78 percent nitrogen gas. Although nitrogen's lurking basically everywhere, it's not abundant in the Earth's crust, and it's difficult for li...
蔡基刚《学术英语(理工)第二版》lecture 2-What YOU can do about climate change 上传人:2*** IP属地:湖北上传时间:2022-12-29格式:DOC页数:12大小:52KB积分:30版权申诉 已阅读5页,还剩7页未读,继续免费阅读 版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领...
The Earth's atmosphere is about 78 percent nitrogen, 21 percent oxygen and the rest is trace gases including argon, methane, nitrogen oxide and carbon dioxide (only 0.04 percent). The current average year-round temperature for our planet, according to NASA data, is 58.3 degrees F (which is...
The newsnight was offside and two were also known as laughing gas nitrous oxide is produced when bacteria break down the nitrogen compounds in soils and the oceans, the use of nitrogen fertilizers and farming is increasing the rate at which It is oxide is being added to the atmosphere. ...
The atmosphere of the Earth serves as a key factor in sustaining the planetary ecosystem. The thin layer of gases that envelops the Earth is held in place by the planet's gravity. Dry air consists of 78% nitrogen, 21% oxygen, 1% argon and other inert gases, carbon dioxide, etc.; but...
Free Essay: Banded Iron Formation 1. Describe Earth’s early atmosphere. The atmosphere was carbon dioxide with barle an oxygen. But as the Earth became...