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Asked by sodiumpolyacrylate to David, James, Mike, Suze, Will on 17 Jun 2011.
Question: What is the level of nitrogen in the athosphere of the Earth ? :)
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Mike Dodd answered on 17 Jun 2011:
78% of the air of Earth’s atmosphere is made of Nitrogen. 21% oxygen and a little bit of other gases like CO2.
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James Marrow answered on 17 Jun 2011:
There’s a quite detailed description of the gases at http://scifun.chem.wisc.edu/chemweek/pdf/airgas.pdf
It tells how each of the major gases can be removed.
You can show how much oxygen is in the air by putting a candle in a saucer of water, and then putting a glass jar over it. The candle will burn most of the oxygen, and water enters the jar to replace the oxygen, and you can measure how much the water level goes up in the jar. It’s not exact (it’s good to try to think of reasons why this is), but it’ll be close to 20%
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Suze Kundu answered on 17 Jun 2011:
I’m starting to wonder whether these boys do any work – how do you all answer during the day?! Sodiumpolyscrylate, the boys are right 😛
Comments
sodiumpolyacrylate commented on :
then why do people say that we ONLY breathe oxygen when we breathe other sorts of gases apart from oxygen?
Mike commented on :
You’re right, we breathe in all the gases in the air, but only oxygen is taken up in the lungs by the body. In the lungs, oxygen is taken up into the blood and carbon dioxide (CO2) is released. The other gases go in and come straight back out. So we take in 78% nitrogen and breathe out about 78% nitrogen. In the air we breathe out there is less oxygen and more CO2.
sodiumpolyacrylate commented on :
What is the commonest element in the planet Jupiter?
sodiumpolyacrylate commented on :
sorry wrong place to post it 🙁