Just remembered my high school class where we made various solutions to learn about mixtures and randomly thought of air. I know that there are many things in air aside from oxygen, and thought of this – is air a homogeneous mixture?
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I think it’s easier to explain and understand if it’s broken down.
Air is a mixture of various gasses, such as Nitrogen (78.9%), Oxygen (20.95%), Argon (0.93%), Carbon Dioxide (0.04%) There are also trace amounts of many other like neon (Ne), helium (He), methane (CH4), krypton (Kr), hydrogen (H2), nitrous oxide (NO), xenon (Xe), ozone (O3), iodine (I2), carbon monoxide (CO), and ammonia (NH3) in the atmosphere.
So, which description fits air better?
So, the air is a homogeneous mixture – mostly.
I say mostly because sometimes it can also be considered a heterogeneous mixture when one of the gas in the air in the form of liquid (depends on temperature)