This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Chemical reactions are often permanent changes that occur to the reactants that produce products of the reaction..  The properties physical and chemical of reactants are different from the products.

in a chemical equation, the total mass is preserved.  The total energy is conserved.  The number of atoms of each element is conserved.

1 5 1