erik1228 erik1228

20-01-2020
Chemistry

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In the atmosphere up to an altitude of about 80 km, oxygen (O2) makes up about __ % and nitrogen (N2) comprises about _% of the gases by volume:

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Eduard22sly Eduard22sly

21-01-2020

Answer: Oxygen makes up about 21% and nitrogen makes up 78%

Explanation:

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