AP Chemistry IMF's and Gases

A 7.23 gram sample of PCl₅ is placed in an evacuated 5.00 liter flask and is completely vaporized at 252°C. The pressure if no chemical reaction were to occur is calculated to be 0.299 atm. PCl₅ at this temperature will actually partially dissociate according the above equation. The observed pressure is found to be 0.400 atm. In view of this observation, calculate the partial pressure of PCl₅ in the flask at 252°C.

• 0.101 atm

• 0.198 atm

• 0.133 atm

• 0.400 atm

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NGSS.HS-PS1-7

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