In a reaction between sulfur dioxide (SO2) and oxygen gas (O2), 2.0 moles of SO2 reacts with 1.5 moles of O2¬ to produce sulfur trioxide (SO3). The actual yield of SO3 is 1.8 moles. Determine the limiting reactant, calculate the theoretical yield of SO3 in moles, and find the percent yield of SO3.