15. If a reaction is at equilibrium, what relationship between Keq and Qeq exists?* A. Q K B. Q K C. QK0 D. Qe= K E. The relationship depends on the equilibrium conditions. O A O B O c O E

At a particular temperature a 2.00 L flask at equilibrium contains 2.80 x 104 mol N2, 2.50 x 10-5 mol O2, and 2.00 x 10-2 mol N2O. The 2 N2(9) + Oz(9) = 2 N¿O(g) chemical reaction is: b. Calculate the equilibrium concentration of all the gases. c. Calculate the Keq.

Which of the following statements is FALSE regarding reactions in dynamic equilibrium? O a. At equilibrium, the rates of reactant and product formation are equal. O b. If a chemical species is removed in the system, the system will favor the reaction that forms back the removed species. O C. At equilibrium, the concentrations of all species are equal. O d. In an equilibrium system with Keg > 1, the [products]eg is greater than the [reactantsleg.

1. Sulfur trioxide decomposes spontaneously to form sulfur dioxide and oxygen gases according to the following balanced equation: 2SO, 2SO2 w + O2 Under certain conditions, the equilibrium constant for the reaction is 6.9 x 107. What concentration of oxygen can be expected when 0.400 mol of SO,, comes into equilibrium in a 2.00-L vessel? a. 360 b. Is this mixture at equilibrium? In a 1.00-L container is placed 0.10 mol ofO, 0.50 mol of SO, and 0.20 mol of SO, If not, predict in which direction the reaction will shift. An equilibrium mixture of the same three gases is combined with 0.10 mol of Ar reaction responds by producing more SO, The c. 3 Explain this new equilibrium shift. d. Describe how might a sulfur trioxide manufacturer try to minimize this decomposition reaction? Please choose a method different from part c.