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Oxygen in Air Science Project Idea

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Written by Dee   
Wednesday, 21 November 2007
Science project idea on how much of the air is oxygen.

How much of the air is oxygen?

Can you suggest a method by which this may be found out?

Air Science Experiment

On a metal disk on a flat piece of cork, place a bit of yellow phosphorus. Place the cork on water and invert over it a glass cylinder. Examine after two days. Result? Conclusion?

Quantitative experiments have shown that air has the following composition :
Oxygen, 20+ per cent, Nitrogen, including several inert gases, 79+ per cent, Carbon dioxide, .03 to .04 of 1 per cent.