3) Given the reaction: 2NO2(e)+7H2()2NH3(2)+4H2O90 With the rate law: Rate =k[NO2][H2]2 If the reaction is first studied with 2.0M for each of the reactants, by what factor will the rate change if the concentrations are changed to 4.0M for both of the reactants? 4) Given the reaction: O2(E)+2NO(e)2NO2(e) With the rate law: Rate =k[O2]2[NO] What happens to the rate if the concentration of O2 is doubled? And why? 5) Given the reaction: Cr2O72(m)+3HNO2(qq)+5H+(ma)2Cr3(2)+3NO3(me)+4H2O(1) stuc a) What is the order of reaction with respect to Cr2O727 Second orth b) What is the order of reaction with respect to HNO2 ? c) What is the order of reaction with respect to H ? d) What is the overall rate law? e) Using the experiment 1 data, calculate the value for k, with units