Tuesday
March 3, 2015

Homework Help: chemistry

Posted by Holly on Wednesday, September 14, 2011 at 2:47pm.

An equilibrium mixture of SO2,SO3 and O2 gases is maintained in a 11.5 L flask at a temp at which Kc=55.2 for the rxn:
2SO2 + O2 <> 2SO3.

If the # of moles of SO2 and SO3 are =, how many moles of O2 are present?

I let SO2 and SO3 =x and O2=y. Since SO2 and SO3 will cancel in the equil. eqn, I got 1.81 X 10-2 mol O2 but book says 0.208???

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