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zorro
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Homework Statement
At 627 C and 1 atm pressure, SO3 partially dissociated into SO2 and O2 by SO3--->SO2 +1/2O2. The density of equilibrium mixture is 0.925g/L. What is the degree of dissociation?
Homework Equations
The Attempt at a Solution
I found out the average molecular weight of the mixture by the formula PM=DRT
where D is the density.
Then, average molecular weight = sum of product of mole fractions and molar mass
moles at equilibrium-
SO3- 1-x
SO2- x
O2- x/2
But I did not get correct answer.
The answer is 0.34
Please provide a detailed explanation