For two acids of equal concentration, the stronger acid has a higher concentration of hydronium ions which is denoted as option C.
This is a substance which reacts with a base to form a salt and examples include hydrochloric acid etc.
Acidic aqueous solutions contain the hydronium ion (H3O+) which makes it the most appropriate choice.
Read more about Acid here https://brainly.com/question/25148363
#SPJ2