Answer
An aqueous solution of $NH_4Cl$ contains only ions.
Work Step by Step
Since $NH_4Cl$ is a strong electrolyte, it will completely dissociate into $N{H_4}^+$ and $Cl^-$ ions. That reaction can be represented by this equation:
$NH_4Cl(s) -^{H_2O}-\gt N{H_4}^+(aq) + Cl^-(aq)$.
Since the $NH_4Cl$ is completely consumed, there are no molecules remaining in the solution. Only the produced ions ($N{H_4}^+$ and $Cl^-$) will remain.