The decomposition of NO2 is a second order reaction and the rate constant is 0.755 L/mol-s. In an experiment, the initial concentration of NO2 was 0.00650 mol/L. What is the half-life? Select one: a. 103.45 sec b. 304.56 sec c. 303.76 d. 203.76

27 The reaction: 2NO + Cl2 → 2NOCl is second order in NO, first order in Cl2 and third order. Compare the initial rate of reaction a mixture of 0.02 mol of NO and 0.02 mol of Cl2 in one liter container with the rate of reaction when two third of NO was consumed? Select one: a. 2/27 b. 3/27 c. 5/27 d. 4/27

43-46 Consider the time and concentration data for: 2 NO2(g) 2 NO(g) + O2(g). Time, s [NO2] 43 a. How long is the first half-life? Write the value and units 0.100 0.072 20 b. How long is the second half-life? Write the value and units 0.050 50 44. Write the rate law for this reaction. Explain why you made this choice. 0.036 90 0.025 150 45. What is the value of the rate constant? Write the general equation, the calculation equation with units, and the answer with units 46. How much time is needed until only 0.010 M NO2 remains? Write the general equation, the calculation with units, and the answer with units c