Is air an element, compound, homogeneous mixture, or a heterogeneous mixture?

1 Answer
anor277
Jan 30, 2016

Air is an homogeneous mixture of several gases.

Explanation:

The air we breathe is composed of varying elemental gases, mostly #N_2#, and #O_2#, and some inert gas elements in trace quantities. There are small (but increasing) concentrations of #CO_2#, #SO_2#, and nitrogen oxides.

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