The Isomerization of Methylisonitrile to Acetonitrile CH₃NC (G) → CH₃CN

The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g)
Is first order in CH₃NC. The half-life of the reaction is 2.70 × 10⁴ s at 463 K. The rate constant when the initial [CH₃NC] is 0.030 M is ________ s^-1.

A) 3.90 × 10⁴
B) 1.23 × 10^-3
C) 2.57 × 10^-5
D) 8.10 × 10²
E) 1.25 × 10⁷