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(XI) (10 points) A 10.0 L flask at 500K is filled with 0.30 mol of lıydrogen and 0.30 mol of iodine. They react as indicated below. The equilibrium constant K = 45.0. What are the equilibrium concentration of the three gases? H (9) + 1(9)2111(9) 00000 [H2] = [12] = 0.023M, (HI) = 0.046 M [H] = [1] = 0.0069M, [HI] = 0.046 M [H2] = [12] = [HI] = 0.023 M (H2) = (L= 0.0069M, (HI) = 0.023 M [H.] = [12] = 0.023M, (HT) = 0.46 M (XII) (6 points) The energy profiles for four different reactions are shown in Figure 3. The scales are the same for each. Which reaction requires the least energetic collisions to reach the transition state? O a Obc Od LALA react prod prod Reaction path Reaction path Energy Energy react react prod. Reaction path Reaction path Figure 3: Reaction profiles. Scales are the same for each. (XIII) (10 points) How many moles of sodium acetate must be added to 500 mL of 0.25M acetic acid solution to produce a buffer with a pH of 4.91? The pka of acetic acid is 4.74. You can neglect the change in volume when sodium acetate dissolves in the acetic acid solution. O 0.011 moles O 0.021 moles 0.125 moles O 0.198 moles 0.206 moles