Samples of the air we breathe that were taken from different parts of the world have all been found to contain about 78% nitrogen, 2196 oxygen, 0.9% argon, 0.03% carbon dioxide, and 0.07% other gases. Based on this analysis, which is the correct classification for air?
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Samples of the air we breathe that were taken from different parts of the world have all been found...
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