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### Question Asked by a Student from EXXAMM.com Team

** Q 1184501457. ** At `T(K)`, the partial pressures of `SO_2, O_2` and `SO_3` are `0.662`, `0.100` and `0.331` atm respectively for the reaction

`2SO_2 + O_2 -> 2 SO_3`

at equilibrium. What is the partial pressure of `O_2` when the equilibrium pressures of `SO_2` and `SO_3` are equal at the same temperature.

**EAMCET 2011 **