We are asked to **get the equilibrium partial pressure of SO _{3} given that initially, we have 2 atm SO_{3}, 1.5 atm SO_{2 }and 1 atm O_{2 }and the reaction is :**

2 SO_{3} (g) ⇌ 2 SO_{2} (g) + O_{2} (g)

A container initially contains 2.0 atm SO_{3}, 1.5 atm SO_{2} (g) and 1.0 atm O_{2} (g) and is allowed to reach equilibrium. What is the **equilibrium partial pressure** of SO_{3} (g) if Kp = 3.4 x 10^{-1} at 1000 K?

2 SO_{3} (g) ⇌ 2 SO_{2} (g) + O_{2} (g)

A) 2, 0 + 2x

B) 2x

C) 2, 0 -2x

D) 1.5-x

E) 0