Is #O_2# a pure substance or mixture?

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Is #O_2# a pure substance or mixture?

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Answer 1 · 2016-09-28T05:40:57

Dioxygen gas is a pure substance.

Explanation:

#O_2#, for instance the oxygen you would use from a tank in oxy-acetylene welding, is a pure substance. The oxygen we breathe now, is part of a mixture in air; approx. 21% by volume.

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Is #O_2# a pure substance or mixture?

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