6. A hypothetical reaction, A + B +2C → 2D + 3E, has the rate law as Rate = -(△[A]/△t) = k[A][B]² . An experiment is carried out when [A]₀ = 0.01 M, [B]₀ = 3.0 M and [C]₀ = 2.0 M. The reaction is started, and after 8 s, the concentration of A is 0.0038 M. Based on the information, the concentration of A after 13 s is__________ M.
(A)0.0038
(B) 0.30
(C)0.025
(D) 0.0021
(E)0.00011

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