can you help me with this problem?

Question

In a tritation of NHO3,your add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. you quickly add 20.00 mL of 0.0502 M NaOH bu overshoot the end point and the solution turns deep pink. instead of staring over, you add 30.00 mL of the acid, and the solution turns colorless. Then, it takes 3.27 mL of the NaOH to reach the end point. what is the concentration of the HNO3?

Answer 1

OK, it took 23.27 mL of NaOH to react with 80.00 mL of your acid.

(0.02327 L X 0.0502 mol/L)/ 0.08000 L = ___ mol HNO3/L