I need a good website that helps me review the unit in my chemistry book called Air: Chem. and the Atmosphere?

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I need a good website that helps me review the unit in my chemistry book called Air: Chem. and the Atmosphere?

I have a test tomorrow on it and I need practice quizzes or something to do online because our teacher isnt really good at reviewing. So if anyone has advice on this unit or anything that can help me on this test, it is much appreciated.

2007-05-15 12:21:53 · 1 answers · asked by Lindsey H 1 in Science & Mathematics ➔ Chemistry

1 answers

Composition of our air.
20.9% oxygen
1.1 % green house gas.
78 % nitrogen

2007-05-15 12:36:29 · answer #1 · answered by JOHNNIE B 7 · 0⤊ 0⤋