To a 25.00 mL volumetric flask, a lab technician adds a 0.350 g sample of a weak monoprotic acid, HA , and dilutes to the mark with distilled water. The technician then titrates this weak acid solution with 0.0862 M KOH . She reaches the endpoint after adding 42.83 mL of the KOH solution. Determine the number of moles of the weak acid in the solution.