How do enzymes lower the activation energy of a reaction? select one: a. they provide heat to the reaction b. they facilitate the reaction to occur c. they provide additional hydrogen ions?

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.