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A sample of iron(II)sulfate was heated in an evacuated container to 920 K, where the following...

A sample of iron(II)sulfate was heated in an evacuated container to 920 K, where the following reactions occur:

               2FeSO4(s) ↔ Fe2O3(s) + SO3(g) + SO2(g)

               SO3(g) ↔ SO2(g) + ½ O2(g)

At equilibrium the total pressure is 0.836 atm and the partial pressure of oxygen was 0.0275 atm. Calculate Kp for both reactions

Figured out kp for first reaction to be 0.163 but need help figuring out kp for second reaction

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A sample of iron(II)sulfate was heated in an evacuated container to 920 K, where the following reactions occur:

               2FeSO4(s) ↔ Fe2O3(s) + SO3(g) + SO2(g)

               SO3(g) ↔ SO2(g) + ½ O2(g)

At equilibrium the total pressure is 0.836 atm and the partial pressure of oxygen was 0.0275 atm. Calculate Kp for both reactions

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