To calculate the rate of reaction for the combustion of methane, we first need to determine the balanced chemical equation for the reaction:CH g + 2O g CO g + 2HO g Now, we need to find the number of moles of methane CH that reacted:Moles of CH = mass of CH / molar mass of CHMoles of CH = 4.7 g / 12.01 g/mol C + 4 * 1.01 g/mol H Moles of CH = 4.7 g / 16.05 g/molMoles of CH 0.2928 molNow, we can calculate the rate of reaction:Rate of reaction = moles of CH / timeRate of reaction = 0.2928 mol / 3.5 sRate of reaction 0.0837 mol/sSo, the rate of reaction for the combustion of methane is approximately 0.0837 mol/s.