The diagram shows a chemistry demonstration. Which statement best describes this demonstration? A. Step one contains a compound, which is chemically combined in step two, forming a mixture in step three. B. Step one contains a compound, which is physically combined in step two, forming a mixture in step three. C. Step one contains a mixture of elements, which are physically combined in step two, forming a new compound in step three. D. Step one contains a mixture of elements, which are chemically combined in step two, forming a new compound in step three.
