chemistry

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Please help me with this question
For the system,
PCl5 (g) --> PCl3 (g) + Cl2 (g) K= 26 @ 3000C
In a 5.0 L flask, the gaseous mixture consists of all three gasses with partial pressures as follows:
PCl5 = 0.012 atm
PCl3 = 0.90 atm
Cl2 = 0.45 atm
Is the system at equilibrium?
If yes, explain. If no, which way will the system shift to establish equilibrium?

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