The decomposition reaction X --> products was studied as a function of time. Data are given in the table below.
time (in s) [X] (in mol/L)
0.0 1.450
82.5 0.7245
165 0.4829
248 0.3616
330 0.2897
What is the value of the rate constant? (Give your answer accurate to three significant figures. Do not give units as part of your answer, but use concentrations in mol/L and time in seconds.)
Hint: You must first determine whether the decomposition is zeroth-order, first-order, or second-order.