A) For the gas phase decomposition of hydrogen iodide at 700 K 2 HIH2 + I2 the average rate of disappearance of HI over the time period from t = 0 s to t = 1446 s is found to be 5.67×10-4 M s-1. The average rate of formation of H2 over the same time period is M s-1.

B) The rearrangement of cyclopropane to propene at 500 °C (CH2)3CH3CH=CH2 is first order in (CH2)3 with a rate constant of 6.70×10-4 s-1. If the initial concentration of (CH2)3 is 6.00×10-2 M, the concentration of (CH2)3 will be 1.06×10-2 M after s have passed.

C) The activation energy for the gas phase decomposition of ethyl chloroformate is 123 kJ. ClCOOC2H5C2H5Cl + CO2 The rate constant at 450 K is 2.62×10-4 /s. The rate constant will be 2.86×10-3 /s at K.