0 mL sample of vinegar, which is an aqueous solution of acetic acid, CH3 COOH, requires 19.5 mL of a 0.450 M solution of NaOHto reach the endpoint in…

A 12.0 mL  sample of vinegar, which is an aqueous solution of acetic acid, CH3 COOH, requires 19.5 mL of a 0.450 M solution of NaOHto reach the endpoint in a titration:

CH3 COOH(aq)+NaOH(aq)→NaCH3 COO(aq)+H2O(l)

What is the molarity of the acetic acid solution?