Which statement is true of a chemical change? . a.. it involves changes in the molecular structure.. b.. it involves changes in phase but not changes in the molecular structure. c.. it involves dissolving one substance into another. d.. it involves a change in the state, or phase, of a substance. e.. it involves the process of separating two or more dissolved substances.

A is the answer. Chemical changes happen when atomic bonds are broken or created during chemical reactions. Hence, in this case, it involve changes to molecular structure.

- Change in states are physical changes.

- When salts are dissolved in water, you can use Distillation to separate them. Distillation is a physical change as well.

- Dissolving is just physical change.

The correct answer is either B or A