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PCl(5)(g)hArr PCl(3)(g)+Cl(2)(g),K(p)=1....

`PCl_(5)(g)hArr PCl_(3)(g)+Cl_(2)(g),K_(p)=1.8`. At `250^(@)C` if 50% of `PCl_(5)` dissociates at equilibrium then what should be the pressure of the reaction-system?

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