What is the reaction quotient, Q, for this system when [N2] = 2.00 M, [H2] = 2.00 M, and [NH3] = 1.00 M at 472°C?

For N₂(g) + 3H₂(g) ⇌ 2NH₃(g), the reaction quotient is Q = [NH₃]² / ([N₂][H₂]³). Substituting the concentrations gives Q = (1.00)² / ((2.00)(2.00)³) = 1/16 = 0.0625. The correct choice is 0.0625.

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