(NH4)Cl is an ionic compound that dissociates itself upon its addition to the solvent to form a solution. When it is in the solution it forms ions. The balanced dissociation for for (NH4)Cl is
(NH4)Cl ---> NH4^+ + Cl^-
The dissociation of (NH4)Cl forms 1 mole of ammonium ions (NH4^+) and 1 mole of chloride ion (Cl^-). The equation is already balanced.