Consider the reaction of nitrogen dioxide to form dinitrogen tetroxide. In a closed system, this reaction establishes an equilibrium: 2NO2(g) = N204(9) The data table below shows measured concentration of NO2 over a period of time in a system that starts out with only NO2. (a) Use stoichiometry to calculate the concentrations of N204 at each time. Then calculate the ratio of [N204][NO2] Measurement # Concentration of Concentration of NO2(g), (M) N204(g), (M) 1.00 0.00 |N204/[NO21 (no units) 1 (Time=0.00 minutes) 2 0.80 3 0.50 4 0.40 5 0.30 6 0.20 7 0.15 8 0.10 9 0.10 10 0.10 (b) At what measurement number(s) is equilibrium reached? Explain your reasoning. (e) What is the value of the equilibrium constant, Keq, for this reaction? -2-