7. At a given temperature, Kc=7.00 for the equilibrium Br2(g)+Cl2(g)2BrCl(g) If 1.686mol of Br2(g),1.686 mole of Cl2(g), and 6.00mol of BrCl(g) are introduced into a 1.0L container, what will be the equilibrium concentration of Br2(g) ? Express your answer in unit of M using at least three significant figures. Do not use scientific notation