The Equilibrium Constant K_c for the Reaction

question 79

Multiple Choice

The equilibrium constant K_c for the reaction
PCl₃(g) + Cl₂(g)
PCl₅(g)
Is 49 at 230°C.If 0.70 mol of PCl₃ is added to 0.70 mol of Cl₂ in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl₃ when equilibrium has been established?

• A)0.049 M
• B)0.11 M
• C)0.30 M
• D)0.59 M
• E)0.83 M