The following data are for the decomposition of dinitrogen pentoxide in carbon t

The following data are for the decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °C.

N2O5 
 
2 NO + ½ O2 

[ N2O5 >, M 1.26 0.630 0.315 0.158
  time, min 0 116 232 348

Hint: It is not necessary to graph these data. 

(1) 

The half life observed for this reaction is 
 
min .

(2) 

Based on these data, the rate constant for this 
 order reaction is 
 
min 
-1.

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