Health, 09.07.2019 05:00, cmanglona

The main substances in air are n 2 (nitrogen), o 2 (oxygen), co 2 (carbon dioxide), h 2 o (water), and ar (argon). which of these substances are elements? which are compounds? which are molecules?

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The main substances in air are n 2 (nitrogen), o 2 (oxygen), co 2 (carbon dioxide), h 2 o (water), a...