Compare and contrast a pure substance with a mixture and give an example.

Of any substance? What about two powders such as 1/2 cup of white flour, then mixing 1/2 cup of salt together with the flour. This would then form a more coarse mixture being that the two particles differ in shape.

sry but any answer choices

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.