The isomerization of methylisonitrile to acetonitrilech3nc(g)→ch3cn(g)is first order in ch3nc . the rate constant for the reaction is 2.34×10−4 s−1 at 489 k .the half-life of the reaction when the initial {\rm [ch_3nc]} is 0.030 m is {\rm s}.a. 1.43×105b. 3.37×10−4c. 4.28×103d. 2.14×103e. 2.96×103