For the conversion of methyl isonitrile to acetonitrile in the gas phase at 250

For the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 °C

CH₃NCCH₃CN

the following data have been obtained:

The average rate of disappearance of 
CH₃NC over the time period from t = 
488
s to t = 
732
s is 
 M 
s
^-1.