previous 12 of 21 Problem 8.41 A leak allows one-half of the Ne atoms to escape

Question

previous 12 of 21 Problem 8.41 A leak allows one-half of the Ne atoms to escape A sample containing 1.60 moles of Ne gas has an inišal volume of 7.50 L.What is the fnal volume of the gas, in liters, when each of the following changes occurs in the quantity of the gas at constant pressure and temperature? Submit My Answers Give Up Part B A sample of 3.50 moles of Ne is added to the 1.60 moles of Ne gas in the container mily mily nation Submit My Answers Give Up ments Part C A sample of 18.0 z of Ne is added to the 1.60 moles of Ne gas in the container bycenter CE COM .com

Explanation / Answer

Ans

Part A :

when half of the atoms have leaked , the amount of Ne atoms left = 1.60 / 2 = 0.8 moles

Volume is directly related to the number of moles by the expression :

V1n2 = V2n1

7.50 x 1.60 = V2 x 0.8

V = 15 L

Part B :
Total number of moles = 3.50 + 1.60 = 5.1 moles

Using the formula :

V1n2 = V2n1

7.5 x 5.1 = V2 x 1.6

V = 23.9 L

Part C :

18.0 g of Ne = 18/20.1797 = 0.89 moles

total number of moles = 1.60 + 0.89 = 2.49 moles

V1n2 = V2n1

7.5 x 2.49 = V2 x 1.60

V = 11.67 L

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