For the reaction 2HI(g) ⇌ H2(g) + I2(g) – QKJ, the equilibrium constant depends upon
temperature
pressure
catalyst
volume
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Three moles of PCl5, three moles of PCl3 and two moles of Cl2 are taken in a closed vessel. If at equilibrium the vessel has 1.5 moles of PCl5, the number of moles of PCl3 present in it is