At a High Temperature, Equal Concentrations of 0 $\rightleftharpoons$ 2 HI(g)
When Equilibrium Is Reached, the Concentration of H₂(g)

question 69

Multiple Choice

At a high temperature, equal concentrations of 0.160 mol/L of H₂(g) and I₂(g) are initially present in a flask. The H₂ and I₂ react according to the balanced equation below. H₂(g) + I₂(g) $\rightleftharpoons$ 2 HI(g)
When equilibrium is reached, the concentration of H₂(g) has decreased to 0.036 mol/L. What is the equilibrium constant, K_c, for the reaction?

• A) 3.4
• B) 4.0
• C) 12
• D) 22
• E) 48

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