For the reaction
I2(g)+Br2(g)⇌2IBr(g)
Kc = 280 at 150 ∘C. Suppose that 0.500 mol IBr in a 2.00-L flask is allowed to reach equilibrium at 150 ∘C.
Part A
What is the equilibrium concentration of IBr?
Express your answer in moles per liter to three significant figures.
[IBr]= M