You walk into the lab, and you find a beaker sitting on the bench labeled HNO3. However, the concentration is not given. Your instructor tells you to do a titration to determine the concentration of the acid. You find that is takes 27.60 mL of 1.00 M NaOH to neutralize 10.00 of the HNO3. What is the concentration oft the HNO3?

HNO3 + NaOH
H2O + NaNO3