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A 250 mL flask contains air at 1.061 atm and 20.3 °C. 5 mL of ethanol...

A 250 mL flask contains air at 1.061 atm and 20.3 °C.
5 mL of ethanol is added, the flask is immediately sealed and then warmed to 93.3 °C, during which time a small amount of the ethanol vaporizes. The final pressure in the flask (stabilized at 93.3 °C) is 2.833 atm.
(Assume that the head space volume of gas in the flask remains constant.)

a. What is the partial pressure of air, in the flask at 93.3 °C?

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b. What is the partial pressure of the ethanol vapour in the flask at 93.3 °C?

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