7 and 8 PLEASE

7. At a given temperature, Kc=7.00 for the equilibrium Br2(g)+Cl2(g)2BrCl(g) If 1.686mol of Br2(g),1.686mole 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. 8. Consider the following reaction at equilibrium: 2NH3(g)N2(g)+3H2(g)H=+92.4kJ Which of the following changes will increase the moles of H2(g) produced? I. Doubling the volume of the container. II. Increasing the temperature of the reaction. III. Adding more N2(g) to the reaction vessel. IV. Decreasing the partial pressure of NH3(g). A. I only B. IV only C. I and II only D. III and IV only E. I, II, III, and IV