Consider this reaction:
2N2O5(g) → 2N2O4(g) + O2(g)
At a certain temperature it obeys this rate law.
rate = (4.1 s^-1)[N2O5]
Suppose a vessel contains N2O5 at a concentration of 0.640 M. Calculate how long it takes for the concentration of N2O5 to decrease to 8.0% of its initial value. You may assume no other reaction is important.
Round your answer to 2 significant digits.