The reaction below has Kc = 280 at 150C:

𝐼2 (𝑔)+ π΅π‘Ÿ2 (𝑔) β‡Œ2πΌπ΅π‘Ÿ (𝑔)
A 0.500 mol sample of IBr was placed in a 1.00 L flask at this temperature and was allowed to reach equilibrium. What are the equilibrium concentrations for I2, Br2, and IBr?