The decomposition of N2O5 is given by the following equation: 2N2O5(g)→4NO2(g)+O2(g) At an initial [N2O5]0=3.15M, the initial rate of reaction is 5.45×10−5M/s and when [N2O5]0=0.78M, the initial rate of reaction is 1.35×10−5M/s. What is the rate constant of this reaction?