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* 100%- 6 (a) NOs decomposes in the gas phase by the reaction: 2 N2Os (g) 4 NO2 (9)+ 02 (9) At 25C, a sample of gaseous N,O, showed the following dependence of concentration on time: IN2Os/(mmol dm-3) 8.0 4.3 2.3 1.20 0.64 Time/h 10 15 20 (0 Determine the order of reaction by plotting an appropriate graph. (i) Determine the rate constant for this reaction. () Find the concentration of NO2 after 25 h [5 marks] [2 marks] 12 marks]
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