Q12. For the first order reaction A → B+C, carried out at 27 ° C if 3.8 x 10-16 % of the reactant molecules exist in the activated state, the Ea ( activation energy ) of the reaction is (a) 12 kJ/mole (b) 831.4 kJ/mole (c) 100 kJ/mole (d) 88.57 kJ/mole Share with your friends Share 2 Decoder_1 answered this -42 View Full Answer Ashutosh answered this check the formula for this from textbook -34