The reaction shown below has an equilibrium constant value of Kc=0.580 at a certain temperature. H₂ (g) + Br₂ (g) ⇄ 2 HBr (g)     Kc = 0.580 0.500 moles of H₂ and 0.50 moles of Br₂ are sealed in a 2.00 L container. Calculate the concentration of HBr in the container when equilibrium is reached.

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