Apple Googie YouTube Apple 0 t Daiton\'s Law of Partal Pressure Dalton\'s Law of

Question

Apple Googie YouTube Apple 0 t Daiton's Law of Partal Pressure Dalton's Law of Partial Pressure Part A A100Ltask is filed wit, 1.20 g of argn·t 2S-C.Asanple of ethane vapor is added to the same lask until the total pressure is What is the partial pressure of arpon, Pas, in the fask? Express your answer to three significant figures and include the appropriate units 000 atm Hints Pu. 0.655 latm My Answers Give Up Incorrect; Try Again; 5 attempts remaining Part B What is the partial pressure of ethane, Pa in the ask? Express your answer to three significant figures and include the appropriate units Hints Phan Value Units My Answers Give Up

Explanation / Answer

mass of argon= 1.2 grams

molar mass of argon = 40 grams

number of moles of argon= 1.2/40 = 0.03 moles

Total pressure = P= 1.00 atm

Volume= V= 1.00L

T= 25C= 25 +273 = 298K

R= 0.0821 L-atm/mole-K

PV= nRT

n= PV/RT = 1.00 x 1.00/0.0821 x 298 = 0.041 mole

number of moles of ethane= 0.041 moles

Total number of moles = 0.03 + 0.041 = 0.071 moles

mole fraction of Argon = 0.03/0.071 = 0.422

mole fraction of ethane = 0.041/0.071= 0.0577

Part -A

Partial pressure of Argon = Total pressure x molefraction

                                       = 1.000 x 0.422 = 0.422 atm

Partial pressure of argon = 0.422 atm

Part-B

partial pressure of Ethane = 1.000x 0.577 = 0.577atm

partial pressure of Ethane= 0.577 atm.

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