chemistry

An equilibrium mixture of SO2, O2, and SO3 at 1000 K contains the gases at the following concentrations: [SO2] = 3.77 10-3 mol/L, [O2] = 4.30 10-3 mol/L, and [SO3] = 4.13 10-3 mol/L. Calculate the equilibrium constant, K, for the following reaction.
2 SO2(g) + O2(g) 2 SO3(g)

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  1. Write the equilibrium constant expression, substitute the numbers in the problem and solve for Kc.

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  2. i did that, but it was wrong, can you show me the correct formula to use

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  3. nevermind, i got the correct answer of 279

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