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

The isomerization of methylisonitrile to acetonitrile CH₃NC(g) → CH₃CN(g)
Is first order in CH₃NC. The rate constant for the reaction is 9.45 × 10^-5 s^-1 at 478 K. The half-life of the reaction when the initial [CH₃NC] is 0.030 mol L^-1 is ________ s.

A) 1.06 × 10⁴
B) 5.29 × 10³
C) 3.53E × 10⁵
D) 7.33 × 10³
E) 1.36 × 10^-4