Air contains about 78% nitrogen and 21% oxygen. What can you conclude from this fact?
Air is a mixture of at least two gases
Air consists of different states of matter
Air is a pure substance
Air consists of components that are chemically joined
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Answer:
Your answer is D
Explanation:
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1
Explanation:
It can not be A because air isn't a mixture of only two gases
It can be B as air consists all three states of matter because air contains
solid( dust particles), liquid ( water vapor ), Gas ( its the main component )
It can t be C because air isn't a pure substance
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