A sample of SO3 decomposes according to the following equation: 2 SO3(g)  2 SO2(g) + 1 O2(g) An equilibrium mixture in a 1-L vessel at 635 oC, contains 0.00169 g of SO3, 0.00326 g of SO2, and 0.00290 g of O2. (a) Calculate KP for this reaction at this temperature. KP =  . (b) What is the total pressure exerted by the equilibrium mixture of gases? Ptotal =  atm.

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