What are four similarities between mixtures and molecules?

Explanation:

1. The constituents or components of a mixture and compound can easily be separated.

2. Both mixture and compound can be heterogeneous.

3. Both compound and mixture are combined in a definite ratio or in any proportion.

4. Both compound and mixture consist of two or more substances/elements.

5. Both compounds and mixtures have physical and chemical properties.

Hope it helped you.

dynamic equilibrium is the answer.