Question

answer these questions:
how can you tell if a material is pure or a mixture?

how can you differentiate elements from compounds?

how can you differentiate compounds from mixtures?

how can you differentiate heterogeneous mixtures from solutions?

Explanation:

Answer:

Check if it has a fixed composition and distinct properties.
Elements consist of one type of atom; compounds have two or more chemically bonded.
Compounds have fixed composition; mixtures have variable.
Heterogeneous mixtures have visibly different parts; solutions are uniform.