The decomposition of nitrogen dioxide was monitored at 400K and the results are shown in Table Q8. (a) By plotting the appropriate graphs, determine the order of the reaction. (15 marks) (b) The elementary reaction was found to be 2NO2(g)2NO(g)+O2(g). What is the value of the rate constant, K ? (5 marks) The reaction was subsequently repeated at the same temperature, but with an (c) Using the appropriate integrated rate law, how long would it take for the nitrogen dioxide concentration (NO2) ) to fall to 0.40moldm3