The overall thermal decomposition reaction of acetaldehyde is CH3CHO --k-> CH4 + CO A sequence of elementary chain reaction steps proposed to explain the decomposition of acetaldehyde is as follows: CH3CHO --k1-> CH3* + CHO* CH3* + CH3CHO ---k2--> CH3* + CO + CH4 CHO* + CH3CHO* ---k3--> CH3* + 2CO + H2 CH3* + CH3* --k4--> C2H6 Write an equation for the overall rate of decomposition. Do the order and stoichiometry agree in this case? Justify your answer.