A 295-mL flask contains pure helium at a pressure of 761 torr . A second flask w
ID: 518894 • Letter: A
Question
A 295-mL flask contains pure helium at a pressure of 761 torr . A second flask with a volume of 485 mL contains pure argon at a pressure of 728 torr . Part A If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? PHe = torr SubmitMy AnswersGive Up Part B If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon? PAr = torr SubmitMy AnswersGive Up Part C If the two flasks are connected through a stopcock and the stopcock is opened, what is the total pressure? Ptotal = torr
Explanation / Answer
Given that ;
A 295-mL flask contains pure helium at a pressure of 761 torr
A second flask with a volume of 485 mL contains pure argon at a pressure of 728 torr
total volume : 485ml + 295 ml = 780ml
761torr(29 5ml/780ml) = 287.8 torr for He
72 8torr(485ml/780ml) = 452.7 torr for Ar
287.8 + 452.7 = 740.5 torr total pressure
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