Question
Asked Nov 24, 2019
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A mixture of He and CO2  is placed in a 7.5L flask at 22C. The partial pressure of the He is 2.2 atm and the partial pressure of the CO2 is 1.9 atm. What is the mole fraction of He?

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Expert Answer

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Step 1

Given data:

Partial pressure of He(P) = 2.2 atm
Partial pressure of Co, (Pco,=1.9 atm
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Partial pressure of He(P) = 2.2 atm Partial pressure of Co, (Pco,=1.9 atm

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Step 2

The total pressure is the sum of partial pressure of He and CO2. The total pressure is calculated as shown below.

2.2 atm 1.9 atm
= 4.1 atm
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2.2 atm 1.9 atm = 4.1 atm

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Step 3

The mole fraction of helium (He) is calcu...

(1)
Where
P is partial pressure of He
xis the mole fraction of He
P is total pressure
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(1) Where P is partial pressure of He xis the mole fraction of He P is total pressure

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