At 700 K the reaction
2 SO2(g) + O2(g) ⇌ 2 SO3(g)
has Kp=3.0×103. In a 1.0 L rigid vessel at this temperature the total pressure at equilibrium is 1.50 atm, and the partial pressure of O2 is measured to be 0.10 atm. Calculate the equilibrium partial pressure of SO3(g) in atm.