If you were to draw a potential energy diagram, would the reactant or products have higher energy? Why? HELP PLEASE!!!

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

What is the subscript for oxygen in its molecular formula

Ab c or d ? i’m not sure what the answer is