Air contains mostly nitrogen (78%) and oxygen (21%). it also contains other gases, including carbon dioxide and helium, and various pollutants (both gases and solids). write a brief explanation about why air is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated into its components.

Air is a mixture as it contains more than one type of substance that can be a mixture of gases only or including solid particles.

The mixture is the presence of two or more types of substances physically together. In the mixture, each component exhibits its original properties and can be easily separated.

On the basis of the state of components mixture are two types:

homogeneous mixture - if components have the same physical state such as solid, liquid, or gas. if air has only gases then it would have a homogenous mixture.heterogeneous mixture - if components have different physical states such as in the given case air has gases as well as solid pollutants, So air is a heterogeneous mixture.

The components of air can be separated by:

Electrostatic precipitation: It is used to remove solid pollutants from air such as dust particles and other particles.

Fractional distillation: it is used for the separation of a mixture into its component parts, it helps in separating various gases from the air.

Learn more about separation of air:

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Air is a mixture because it consists of more than one substance.

If it contains solids, it is a heterogeneous mixture, because it contains both gases and solids.

The solids can be removed by electrostatic precipitation.

The liquids can be removed by fractional distillation.

You cool the air to a temperature below -269 °C and then carry out a fractional distillation.

The helium will distill at -269 °C.
The nitrogen will distill at -196 °C.
The oxygen will distill at -183 °C.
The residue will be solid carbon dioxide, which is a solid that sublimes at
-78.5 °C.

Because it was a dramatically big guy

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.