Agas mixture contains .150mol of o2 gas and .211mol of ar gas. what is the mole fraction of o2 in the mixture

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

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Calculate the mole fraction of oxygen

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

χ₁ = 0.150/0.361

χ₁ = 0.416

increased stability in the completion of fluorine's outer shell.

the answer is na (sodium)