answer
chemical equation for the reaction of sulfur dioxide (SO2) with carbon monoxide (CO) is:
SO2 + 2CO → CO2 + S
number of moles of SO2 required to produce 118.0 mol CO can be calculated:
1 mole SO2 reacts with 2 moles CO
x moles SO2 reacts with 118.0 mol CO
x = (1/2) × 118.0 mol CO
x = 59.0 mol SO2
59.0 moles of SO2 are required to produce 118.0 mol CO