Numerical value of reaction?

Question

Consider the following reaction:

2SO2(g)+O2(g)⇌2SO3(g)

What is the numerical value of Kc for the reaction if the concentrations at equilibrium are [SO2] = 0.11 M , [O2] = 0.09 M , and [SO3] = 0.53 M ?

Answer 1

                    2SO₂(g) + O₂(g) ⇌ 2SO₃(g)

Equilibrium:  0.11 M    0.09 M     0.53 M

Equilibrium constant, Kc = [SO₃]² / ([SO₂]² [O₂]) = 0.53²/ (0.11² × 0.09) = 260.

Answer 2

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