We’re being asked to **calculate the partial pressure of CH _{4}** in a

Recall that the ** partial pressure of a gas (P_{Gas})** in a mixture is given by:

$\overline{){{\mathbf{P}}}_{{\mathbf{gas}}}{\mathbf{=}}{{\mathbf{X}}}_{{\mathbf{gas}}}{{\mathbf{P}}}_{{\mathbf{total}}}}$

where **χ**** _{Gas}** = mole fraction of the gas and

The ** mole fraction of the gas** is then given by:

$\overline{){{\mathbf{X}}}_{{\mathbf{gas}}}{\mathbf{=}}\frac{\mathbf{mole}\mathbf{}\mathbf{gas}}{\mathbf{total}\mathbf{}\mathbf{moles}}}$

A mixture of 8.1 g CH_{4} and 8.1 g Xe is placed in a container and the total pressure is found to be 0.45 atm .

Find the partial pressure of CH_{4}.

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