Consider the following system at equilibrium at 500 K: PCl5(g) PCl3(g) + Cl2(g) When some PCl3(g) is added to the equilibrium system at constant temperature: The reaction must:   A. Run in the forward direction to restablish equilibrium.     B. Run in the reverse direction to restablish equilibrium.     C. Remain the same. Already at equilibrium.

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A: mole=weightmolar massnpds=2.860208=1.02volume=700ml=0.7lit              PCI5⇌PCI3+CI2at t=0…