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Edit View History Bookmarks People Window Help DA 100% ES2 Mon Mar 20 4:19:57 p MasteringPhysics: Ch 12 HW Secure https://session.masteringphysics.com/myct/itemView?assignmentProblemID 73337563&offset-next; PHY143 W17 College Physics I Tarini Signed in as lsalah Alexander Help Close ch 12 HW Problem 12.12 Enhanced with Feedback Resources previous l 3 of 10 I next Problem 12.12 Enhanced with Feedback Part A Total lung capacity of a typical adult is At sea level and at an average body temperature of 378Chow many moles of oxygen do the lungs approximately 5.0 L. Approximately 20% of the air contain at the end of an inflation? is oxygen Express your answer using two significant figures. You may want to review (D pages 360-366) Submit My Answers Give Up teedback Continue

Explanation / Answer

Pressure, P at sea level is = 1 atm

Volume of gas is V = 20% of 5L = 1 L so V =1.0L

R= universal gas constant = 0.0821 L*atm/mol*K

T = 37o = 37 + 273 = 310 K

from ideal gas equation PV = n RT

n = PV/RT = (1.0 x 1)/ (0.0821 x 310)

n = 0.0393 moles

Hence the number of moles of oxygen is 0.0393 moles

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