At a certain temperature, this reaction follows first-order kinetics with a rate constant of 2.11 s-1.
2Cl2O5(g) → 2Cl2(g) + 5O2(g)
Suppose a vessel containing Cl2O5 at a concentration of 1.00 M. Calculate the concentration of Cl2O5 in the vessel 0.520 seconds later. You may assume no other reaction is important.
Round your answer to 2 significant digits.