A partially decomposed PCl5 (g) along with its dissociation product is subjected to diffusion study and the gases cumin out initiaaly collected in an another flask. The rate of effusion collected gaseous mixture was found to be 0.45 times rate of effusion of pure oxygen gas. Determine the degree of dissociation of PCl5 (g) in the original sample.

Dear student,

The effusion rate of a gas is inversely proportional to the square root of its molecular mass.

Mathematically, this can be represented as:

Rate₁ / Rate₂ = square root of (Mass₂ / Mass ₁)

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