Chemistry Practice Problems Equilibrium Expressions Practice Problems Solution: Consider the reaction: 2NH3 (g) ⇌ N2 (g) + 3H2 (g)...

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Solution: Consider the reaction: 2NH3 (g) ⇌ N2 (g) + 3H2 (g) Select the equilibrium constant expression. (A) Kc = [NH3]2/[N2][H2]3 (B) Kc = [N2]2/[H2][NH3] (C) Kc = [N2][H2]3/[NH3]2 What is the numerical value of Kc for the reaction if the concentrations at equilibrium are 0.19 M NH3, 5.0 M N2, and 0.60 M H2? Express your answer using two significant figures.

Problem

Consider the reaction: 

2NH3 (g) ⇌ N2 (g) + 3H2 (g) 

Select the equilibrium constant expression. 

(A) Kc = [NH3]2/[N2][H2]3 

(B) Kc = [N2]2/[H2][NH3

(C) Kc = [N2][H2]3/[NH3]2 

What is the numerical value of Kc for the reaction if the concentrations at equilibrium are 0.19 M NH3, 5.0 M N2, and 0.60 M H2

Express your answer using two significant figures.

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