For N₂ + 3H₂ ⇌ 2NH₃ the equilibrium concentrations are [N₂] = 2, [H₂] = 3 and [NH₃] = 2 mol/L. What is Kc?

Answer and explanation

Correct answer: A. 0.074

  1. Step 1: Kc = [NH3] squared / ([N2][H2] cubed).
  2. Step 2: Kc = 4/(2 x 27) = 0.074.
Answer
0.074.
Why not the others: 0.333, 0.667 and 13.5 do not fit.

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