# Problem: A gas mixture contains each of the following gases at the indicated partial pressures: N2, 221 torr ; O2, 131 torr ; and He, 131 torr .What mass of each gas is present in a 1.30 -L sample of this mixture at 25.0 oC?

###### FREE Expert Solution

$\overline{){\mathbf{PV}}{\mathbf{=}}{\mathbf{nRT}}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\mathbf{n}\mathbf{=}\frac{\mathbf{m}}{\mathbf{M}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(\mathrm{PV}=\frac{m}{\overline{)M}}\mathrm{RT}\right)\overline{)\left(M\right)}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\frac{\mathbf{PVM}}{\mathbf{RT}}\mathbf{=}\frac{\mathbf{m}\overline{)\mathbf{RT}}}{\overline{)\mathbf{RT}}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\overline{){\mathbf{m}}{\mathbf{=}}\frac{\mathbf{PVM}}{\mathbf{RT}}}$

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###### Problem Details

A gas mixture contains each of the following gases at the indicated partial pressures: N2, 221 torr ; O2, 131 torr ; and He, 131 torr .

What mass of each gas is present in a 1.30 -L sample of this mixture at 25.0 oC?