A mixture of SO₂, O₂, and SO₃ at 1000 K contains the gases at the following concentrations: [SO₂] = 5.0 × 10⁻³ mol/L, [O₂] = 1.9 × 10⁻³ mol/L, and [SO₃] = 6.9 × 10⁻³ mol/L. Is the reaction at equilibrium? If not, which way will the reaction proceed to reach equilibrium?

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2 SO2(g) + O2(g) 2 SO3(g) Kc = 279