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

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

where:

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

**P _{total}** = total pressure of the gas mixture

A 15-L cylinder contains 4.0 g of hydrogen and 28 g of nitrogen. If the temperature is 27^{o}C what is the total pressure of the mixture?

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