Need help with the calculations

Experiment 11: ACID-BASE TITRATION Sample Data Collection and Results Pages Volume of NaOH used in the Titration: Rough trial Trial 1 Trial 2 Trial 3 Initial reading (mL) . US 39 .41 - 39 Final reading (mL) 24. 23 23. 39 21-93 21. 01 Volume dispensed (mL) 23. 78 23 21. 52 20 - 62 Average volume of NaOH used (Trials 1-3) 21- 71 Molarity of NaOH 0 - 196 4 m Unknown Vinegar # 923 Calculation of moles HC2H302 in 5.00 mL vinegar: Ans. alculation of molarity of vinegar: Ans. aceticacid. alculation of mass % of vinegar