MISSED THIS? Watch Determine the value of the rate constant. KCV: The Integrated Rate Law. IWE: Determining the Concentration of a Beactant Express the rate constant to three significant figures at a Given Time ; Read Section 15.4. You can click on the Review link to access the section in your eText. The data below show the concentration of N2O5 versus time for the following reaction: N2.(N)NTn.(A, Nh g) Part C Predict the concentration of N2O5 at 270s. MISSED THIS? Read Section 15.5. You can click on the Review link to access the section in your eText. The rate constant (k) for a reaction was measured as a function of temperature. A plot of lnk versus 1/T (in K ) is linear and has a slope of 1.99104K Part A Calculate the activation energy for the reaction. Express your answer in kilojoules per mole to three significant figures