Final answer:
The concentration of H ions in a 2.30 M solution of HNO₃ is 2.30 M.
Step-by-step explanation:
To find the concentration of H ions in a 2.30 M solution of HNO₃, we need to know the dissociation of HNO₃ in water. Nitric acid, HNO₃, is a strong acid that completely dissociates in water. Therefore, the concentration of H ions is equal to the molarity of the HNO₃ solution, which is 2.30 M.