Question

A gas mixture contains .150mol of O2 gas and .211mol of Ar gas. What is the mole fraction of O2 in the mixture

Answer 1

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

`n_{\text{tot} = 0.150 + 0.211`

`n_{\text{tot} = 0.361\text{ mol}`

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Calculate the mole fraction of oxygen

n_{\text{tot} = 0.361 [tex]

χ₁ = 0.150/0.361

χ₁ = 0.416