The molarity of the hydrogen ions in a 2.7M solution of the strong acid HCl would be 2.7M. The reason is that the strong acids normally dissociate completely. The equation to show this is
HCl ⇋ H+(aq) + Cl−(aq)"0" 2.7M 2.7MI hope that this is the answer that you were looking for and the answer has actually come to your desired help.