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Answered by Dejanras
Answer is: concentration of chlorine is 1418.34 M. Balanced chemical reaction: PCl₃(g) + Cl₂(g) → PCl₅(g). [PCl₃] = 0.33 M; equilibrium concentration of phosphorus trichloride. [PCl₅] = 0.44 M; equilibrium concentration of phosphorus pentachloride. Keq = 0.00094. Keq = [PCl₅] ÷ [PCl₃] · [Cl₂]. [Cl₂] = [PCl₅] ÷ Keq · [PCl₃]. [Cl₂] = 0.44 M ÷ 0.33 M · 0.00094. [Cl₂] = 1418.43 M.