Which energy difference in the energy profile below corresponds to the activation energies of forward and reverse reactions respectively? (x,y x, x+y ○ y, x+y Oy-x, x Ox+y. y Energy → I Reaction pathway Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in (A)? In [A] time M [A] time O 1[A] time [A]² time [A] M о time