The decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °C
N2O52 NO2 + ½ O2
is  first order in  N2O5 with a rate constant of  4.10×10-3 min-1.
If an experiment is performed in which the initial concentration of  N2O5 is  0.197 M, what is the concentration of  N2O5 after  435 minutes have passed?  __________ M