Q.In a $500 \text{ mL}$ flask, the equilibrium $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$ is established. At this stage, $PCl_5$ is $40\%$ dissociated. If the initial moles of $PCl_5$ were $2$ , the total moles at equilibrium are:

2.8

2.4

3.2

2.0

The correct solution involves applying the fundamental concept to derive the final value step by step...

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