The decomposition of hydrogen iodide on a gold surface at 150 oC

HI(g) ½ H2(g) + ½ I2(g)

is zero order in HI.

In one experiment, when the initial concentration of HI was 0.206 M, the concentration of HI dropped to 3.71E-2 M after 898 seconds had passed.

Based on these data, the rate constant for the reaction is?

2 answers

I need and answer asap please anyone
A = Ao - kt