For the decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °C, the rate of the reaction is determined by measuring the disappearance of N2O5. 2 N2O5 4 NO2 + O2

At the beginning of the reaction, the concentration of N2O5 is 0.218 M. After 182 min the concentration has dropped to 0.103 M.

What is the rate of the reaction?
(mol N2O5/L) /min