A 10.00-mL sample of vinegar, which is an aqueous solution of acetic acid (HC2H3O2), is titrated with 0.5062 M NaOH, and 16.58 mL is required to reach the equivalence point. a) What is the molarity of the acetic acid? b) If the density of the vinegar is 1.006 g/cm3, what is the mass percent of acetic acid in the vinegar [mass percent = (mass of acetic acid / mass of vinegar) * 100%.]