The rate of the reaction ; NO2  +  CO ---------> NO   +   CO2  depends only on the concentration of nitrogen dioxide below 225C. At a temperature below 225C, the following data were collected   Time (s)              [NO2] (mol/L) ____________________________ 0                           0.500 1200                      0.444 3000                      0.381 4500                      0.340 9000                      0.250 18000                     0.174 Calculate [NO2] at 27000s after the start of the reaction Select one: a. 4.87M b. 0.223 M c. 0.131M d. 0.645 M

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