what are chemical reactions? when substances change into new ones with different properties by rearranging…

what are chemical reactions? when substances change into new ones with different properties by rearranging their atoms. the process of mixing substances together so they are evenly mixed. a method of separating mixtures into individual parts.

what are chemical reactions? when substances change into new ones with different properties by rearranging their atoms. the process of mixing substances together so they are evenly mixed. a method of separating mixtures into individual parts.

Answer

Brief Explanations:

Chemical reactions involve substances changing into new substances with different properties by rearranging their atoms. Mixing substances evenly is just a physical - mixing process and separating mixtures is a physical separation process, not chemical reactions.

Answer:

The first option: When substances change into new ones with different properties by rearranging their atoms.