To calculate the maximum yield of benzocaine, we need to use the stoichiometry of the reaction and the molecular weights of the reactants and product.The reaction between p-aminobenzoic acid PABA and ethanol to form benzocaine is as follows:PABA + ethanol benzocaine + waterThe molecular weights of the compounds are:PABA: 137.14 g/molEthanol: 46.07 g/mol not needed in this calculation since it's in excess Benzocaine: 165.19 g/molNow, we can use the starting mass of PABA 5 grams to determine the maximum yield of benzocaine:5 g PABA * 1 mol PABA / 137.14 g PABA * 1 mol benzocaine / 1 mol PABA * 165.19 g benzocaine / 1 mol benzocaine The units of PABA and moles cancel out, leaving us with the mass of benzocaine:5 g * 1 / 137.14 * 165.19 = 6.01 g benzocaineSo, the maximum yield of benzocaine that can be obtained from the reaction is 6.01 grams, assuming 100% conversion of the reactants.