Question

which of the gases are called Nitrogen Oxygen carbon dioxide and helium​

Answer 1

Explanation:

Air is a mixture of gases, consisting primarily of nitrogen (78 %), oxygen (21 %) and the inert gas argon (0.9 %). The remaining 0.1 % is made up mostly of carbon dioxide and the inert "rare gases" such as neon, helium, krypton and xenon.

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Answer 2

Answer:

Air is a mixture of gases, contesting primarily of nitrogen (78%), oxygen (21%),and the inert gas argon (0.9%). The remaining 0.1% is made up mostly of carbon dioxide and there rare gases. Such as neon, helium, krypton and xenon...