An unknown polyprotic carboxylic acid possesses a molecular weight of 493.65g/mol. The carboxylic acid can be titrated according to the following equation: HxCyOz + NaOH --> xH2O + NaxCyOz If 27.33ml of 0.0973M NaOH were used to titrate 0.328g of pure unknown carboxylic acid, determine the number of reactive H in a single molecule of the carboxylic acid.