Methyl isocyanide, CH₃NC, isomerizes, when heated, to give acetonitrile (methyl cyanide), CH₃CN. This reaction is first order. At 230°C, the rate constant for the isomerization is 6.3 × 10⁻⁴ s⁻¹. Let’s assume the concentration of the methyl isocyanide is 4.0 M. How long will it take for this concentration to reach half of its original value?