The reaction 2N2O5(g) --> O2(g) +4NO2(g) is first order in N2O5. For this reaction at 45ºC, the rate constant k = 1.0 × 10–5 s–1. For a particular experiment ([N2O5]0 = 1.0 × 10–3 M), calculate [N2O5] after 2.6 × 105 seconds. a. 7.4 x 10^-5 M b. 1.0 x 10^-3 M c. 2.6 M d. 9.5 M