Air is called a mixture because air contain not only one element or one compound; air contain many elements and compounds: nitrogen, oxygen, argon, carbon dioxide, water vapours, helium, neon, krypton xenon, ozone, radon, pollutants.
The composition of air was established by chemical analysis; from the second half of the XVIIth century gas after gas were discovered in air.
No. Air is a mixture.
Yes, air is a mixture. It is a homogeneous mixture.
Air is a homogeneous mixture.
Air is a homogeneous mixture.
No air is not a homogeneous mixture, air is a heterogeneous mixture.
Air is a mixture.
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Air is a mixture.
Air is a homogeneous mixture.
Air is a mixture of gases.
Air is a mixture.
Air is a homogeneous mixture.