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Which set of conditions shows that the reaction A B is at equilibrium? (Assume that the...

Which set of conditions shows that the reaction A B is at equilibrium? (Assume that the forward and reverse reactions are first-order reactions.)

            a. kforward reaction = 4.2 x 10-2 s-1 , [A] = 0.25 M , kreverse reaction = 1.4 x 10-2 s-1, [B] = 0.25 M

            b. kforward reaction = 0.48 s-1, [A] = 1.8 M , kreverse reaction = 9.5 x 10-4 s-1, [B] = 9.0 M

            c. kforward reaction = 1.1 x 10-1 s-1 , [A] = 0.90 M , kreverse reaction = 3.2 x 10-1 s-1, [B] = 3.0 M

            d. kforward reaction = 2.4 x 10-1 s-1 , [A] = 0.20 M , kreverse reaction = 2.4 x 10-1 s-1, [B] = 0.80 M

            e. kforward reaction = 2.4 x 10-1 s-1 , [A] = 0.20 M , kreverse reaction = 4.8 x 10-1 s-1, [B] = 0.10 M

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