What is the expression for Kc for the reaction 2A + B ⇌ C + 3D?

A. [C][D]^3 / [A]^2[B]
B. [C][D] / [A]^2[B]
C. [C][D]^2 / [A][B]
D. [C][D]^3 / [A][B]^2

Answer: [C][D]^3 / [A]^2[B]


Additional Information: Kc is calculated by taking the concentration of products raised to their coefficients over the concentration of reactants raised to their coefficients.