Masueringchemistry Chapter 11 Homework Google Chrome secure l https://session.ma
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Question
Masueringchemistry Chapter 11 Homework Google Chrome secure l https://session.masteringchemistry. mentProblemIDs77058472 Section 004 Redd Item 18 Item 18 If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helum? A 255 mL flask contains pure helium at a pressure of 742 torr. A second flask with a volume of 470 mL contains pure argon at a pressure of 729 torr 734 Submit My Answers Give Up Incorrect one attempt remaining; Try Again Part B If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon? Submit My Answers Up Part C lf the two flasks are connected through a stopcock and the stopcock is opened what is the total pressure? O Ask me anythingExplanation / Answer
According to Daltons law
Total Pressure = sum of partial pressures
Now as per Boyle law
P1V1 = P2V2
Taking He
P1 = initial pressure = 742 torr
P2 = final pressure ( partial pressure)
V1 = initial volume =255 ml
V2 =final volume = total volume of the finished system = 255 L + 470 L = 725 ml
Now solving for P2
P2 = PHe= P1V1/ V2
= 742 torr x 255ml / 725ml
= 261 torr .......................(A)
Same as for Argon
PAr = 729 torr x 470 ml/ 725 ml
= 473 torr ..................................(B)
Now
total pressure
P = PHe + PAr
= 261 + 473
= 734 torr .....................................(C)