State why chemical equations are useful

A Chemical equation is useful because it shows all the elements or compounds involved on a chemical reaction. It also shows which elements or compounds are the products and which are the reactants.  The behavior of each element or compound can also be seen in the equation, on what each element or compound did as to where they went or what they formed when they reacted.  Chemical equations are very useful because all information are found in one equation, thus, no need for a lot of reading.

Answers are 1,2,4 its correct on edgenuity.