At $T(\mathrm{~K}), K_C$ for the dissociation of $\mathrm{PCl}_5$ is $2 \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$. The number of moles of $\mathrm{PCl}_5$ that must be taken in 1.0 L flask at the same temperature to get 0.2 mol of chlorine at equilibrium is

At $T(\mathrm{~K}), K_c$ for the reaction, $A O_2(g)+B \mathrm{O}_2(g) \rightleftharpoons A \mathrm{O}_3(g)+B \mathrm{O}(g)$ is 16 . One mole each of reactants and products are taken in a IL flask and heated to $T(\mathrm{~K})$, and equilibrium is established. What is the equilibrium concentration of $B O$ ( in $\mathrm{mol} \mathrm{L}^{-1}$ )?