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To an evacuated 1.35L flask at 22.0 oC, hydrogen is added until the total pressure is...

To an evacuated 1.35L flask at 22.0 oC, hydrogen is added until the total pressure is 4.12 atm. Oxygen is then added until the total pressure in the flask is 7.31 atm. The mixture is ignited and the flask heats up to 125oC. What is the total pressure in the flask at 125oC if the combustion reaction resulted in 100% yield?

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