Chemistry - Ionic Equilibrium Question with Solution | TestHub

The self-ionisation constant of ${\mathrm{NH}}_3$ at $50^{\circ }\mathrm{C}$ is given by ${\mathrm{K}}_{{\mathrm{NH}}_3}=\left[{\mathrm{NH}}_4^{+}\right]\left[{\mathrm{NH}}_2^{-}\right]=10^{-30}$. How many ${\mathrm{NH}}_2^{-}$ions are present per ${\mathrm{cm}}^3$ of pure liquid ${\mathrm{NH}}_3$ ? (Assume Avogadro's number $=6\times 10^{23}$ )