Two Isomers (A and B) of a Given Compound Dimerize

question 1

Multiple Choice

Two isomers (A and B) of a given compound dimerize as follows: Both processes are known to be second order in reactant, and k₁ is known to be 0.25 L/mol • s at 25° C, where
Rate = k₁[A]²
In a particular experiment, A and B were placed in separate containers at 25° C, where [A]₀ = 1.0 * 10^-2 M and [B]₀ = 2.5 * 10^-2 M. It was found that [A] = 3[B] after the reactions progressed for 3.0 min.
-Calculate the concentration of A₂ after 3.0 min.

• A) 3.1 * 10^-3 M
• B) 6.9 * 10^-3 M
• C) 1.6* 10^-3 M
• D) 2.8 * 10^-22 M
• E) none of these

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