the products of a reaction. elements created by a reaction. phase changes taking place during a reaction. the number of molecules involved in a reaction.
I gave my students this multiple choice question: A balanced chemical equation shows

Only one answer is correct among these 4 choices:
- the products of a reaction.
- elements created by a reaction.
- phase changes taking place during a reaction.
- the number of molecules involved in a reaction.

Could you tell me which one is correct?

the products of a reaction.