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Pure air is homogeneous because all components are completely miscible.
Air normally is a homogenous mixture as every type of gas has diffused to equilibrium, resulting in a thoroughly uniform mixture. So if you take air samples from 10 different places, you'll find the same ratios of all of the constituent gases. If you include pollution with the city air, however, you'll normally be including non-gaseous particles as well. Other factors such as dust and pollen being taken into consideration also would result in a heterogenous mixture. Sometimes these factors are obviously unmixed (heterogenous) to the point that you can see different amounts of pollution or pollen.
homogeneous
Soil is the most heterogeneous. Air is also heterogeneous on a large scale: air near the sea usually contains more ozone than elsewhere, There is also an ozone layer in the upper atmosphere. Salt water is heterogeneous in the polar regions where melting ice contains less salt than other water.
Airt is a homogeneous mixture.
They can be either one. For instance, ozone is a gas and is there homogeneous, but soot particles are suspended solids (aerosols) and are therefore heterogeneous.
pure air is homogeneous but dusty air is heterogeneous
heterogeneous
No, because it is a heating system, not a cooling system
Pure air is homogeneous because all components are completely miscible.
air is homogeneous
Depends on the quantity of air you are considering.
Air is a homogeneous mixture.
yes
homogeneous
Air is a homogeneous mixture.
Air is homogeneous mixture of gases.