Question

The following data were collected for the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 °C.

CH₃NC(g)--------->CH₃CN(g)

[CH3NC], M	4.20×10-2	2.10×10-2	1.05×10-2	5.25×10-3
time, s	0	160.00	320.00	480.00

(a) What is the half-life for the reaction when [CH₃NC] = 4.20×10^-2 M?

_______s

(b) What is the half-life for the reaction when [CH₃NC] = 2.10×10^-2 M? ______s

(c) Is the reaction first order? yes or no?

If so, what is the rate constant for the reaction? (If not first order leave blank).__________________ s^-1