Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 280 at a certain temperature. If 0.400 mol of IBr is allowed to reach equilibrium in a 3.00 L container, what will the equilibrium concentration of IBr be?.   I₂(g) + Br₂(g) ⇌ 2 IBr(g) Based on the given values, set up ICE table in order to determine the unknown. Where applicable, use x variables to represent any unknown change in concentration. Based on your ICE table, set up the expression for Kc in order to determine the unknown. Do not combine or simplify terms. Based on your ICE table and expression for Kc, solve for the concentration of IBr at equilibrium [IBr]eq =                     M

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