20. Consider the reaction 3A+B+CD + E, where the rate law is defined as

-d[A]dt =(1.66x10² L³/mol³ s)[A]²[B][C]

An experiment is carried out where [B]₀ =2.0 M, [C]₀ = 1.0 M and [A]₀ = 2.5 x10^-4 М. What's the concentration (in 10^-5 M) of A after 5.0 minutes?
(A) 7.2
(B) 8.7
(C) 6.5
(D) 4.2
(E) 1.3

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