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Lin and Sue have a debate whether the air is a mixture or a pure substance. Lin presented her argument that air is a mixture, while Sue stated otherwise and said that air is a pure substance. Who is correct?
A.Sue is correct because oxygen is not an element.
B.Lin is correct because oxygen is the only gas inhaled by human.
C.Sue is correct because air is synonymous to oxygen, hence, pure substance.
D.Lin is correct because air is composed of nitrogen, oxygen, and other gases.
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