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The degree of dissociation is 0.4 at 400...

The degree of dissociation is 0.4 at 400 K and a I atm for the gaseous reaction: `PCI_(5(g)) hArr PCl_(3(g)) +Cl_(2(g))` : assuming ideal behaviour of gases, calculate the density of cquilibrium mixture at 400K and latm

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`4.53 g L^-1`
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