\[\mathrm{PCl}_{5}(g) \rightleftharpoons \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g) ; \mathrm{K}_{\mathrm{C}}=1.844\] 3.0 mo…

\[\mathrm{PCl}_{5}(g) \rightleftharpoons \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g) ; \mathrm{K}_{\mathrm{C}}=1.844\]

3.0 moles of \( \mathrm{PCl}_{5} \) is introduced in a \( 1 \mathrm{~L} \) closed reaction vessel at \( 380 \mathrm{~K} \). The number of moles \( \mathrm{PCl}_{5} \) at equilibrium is _____ \( \times 10^{-3} \). (Round off to the nearest integer)