Answer:
0.416
Explanation:
Mole fraction (χ) is the number of moles of a component divided by the total number of moles in a mixture.
Let O₂ be Gas 1 and Ar be Gas 2.
Calculate the total moles.
n₁ = 0.150 mol; n₂ = 0.211 mol
[tex]n_{\text{tot} = 0.150 + 0.211[/tex]
[tex]n_{\text{tot} = 0.361\text{ mol}[/tex]
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Calculate the mole fraction of oxygen
n_{\text{tot} = 0.361
[tex]
χ₁ = 0.150/0.361
χ₁ = 0.416
