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For aA + bB to cC + dD, the expression for Kc is
A[A]^a[B]^b / [C]^c[D]^d
B[C]+[D] / [A]+[B]
C[C]^c[D]^d / [A]^a[B]^b
D[C]c[D]d / [A]a[B]b
Answer & Solution
Correct answer: C. [C]^c[D]^d / [A]^a[B]^b
Kc is product concentrations over reactant concentrations, each raised to its stoichiometric coefficient.
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