Which is a characteristic of all mixtures?

A mixture is a combination of two substances that be separated from each other. Compounds can't be separated because they are chemically United.

Explanation:

Hi, all mixturres have the following characteristic in common:

They are formed by two or more substances, and those substances can be separated by physical methods (like filtration)All mixtures have variable compositionsThey can be either homogeneous or heterogeneous

Because of this characteristics they differentiate from the compounds, which:

Can't be separated by physical methods because of the chemical bondsHave fixed compositions Are homogeneousHave different properties than the sustances that formed them.

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.