Question

What does air contain ? ​

Answer 1

Answer:

Air contains important substances, such as oxygen and nitrogen, that most species need to survive. ... Standard Dry Air is made up of nitrogen, oxygen, argon, carbon dioxide, neon, helium, krypton, hydrogen, and xenon. It does not include water vapor because the amount of vapor changes based on humidity and temperature

Explanation:

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Answer 2

Answer:

oxygen- 20%

nitrogen- 78%

carbon dioxide- 0.3%

aragorn-0.90%