\( \text{PCl}_5 \rightleftharpoons \text{PCl}_3 + \text{Cl}_2 \quad K_c = 1.844 \)
\( 3.0 \) moles of \( \text{PCl}_5 \) is introduced in a \( 1 \, \text{L} \) closed reaction vessel at \( 380 \, \text{K} \). The number of moles of \( \text{PCl}_5 \) at equilibrium is ________ \( \times 10^{-3} \). (Round off to the Nearest Integer)
