Consider the Reaction
PCl₅(g) $f$ PCl₃(g)+ Cl₂(g)
at a Certain Temperature,If the Initial Concentration of Temperature,If

Multiple Choice

Consider the reaction
PCl₅(g) $f$
PCl₃(g) + Cl₂(g)
At a certain temperature,If the initial concentration of PCl₅(g) Is 3.0 M,At equilibrium the concentration of Cl₂(g) Is 0.80 M.Calculate the value of K_c at this temperature.

A) 0.21
B) 0.29
C) 0.64
D) 3.4
E) 0.46