Unformatted text preview: T = P P . Using this formula we can solve for the mole fraction of a substance. Since we are given the total moles, this will provide us with the # of moles of that substance (mole fraction = moles of substance/total moles). After doing that, we can determine its mass. Below are the calculations: XP T = P P X(2.5atm) = 0.7atm *note: 2.5 atm is the total pressure and is the sum of the partial pressures Therefore, X = 0.28 Moles nitrogen/total moles = 0.28 Moles nitrogen/1.8mol = 0.28 Therefore, Moles nitrogen =0.5mol and from the moles of nitrogen, we can calculate the grams of nitrogen thus: 0.5 mol N 2 │ 28g N 2 = 14 g N 2 │1 mole N 2...
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 Fall '08
 Herron,S
 Mole, Partial Pressure, Moles, Moles nitrogen/total moles, Moles nitrogen =0.5mol

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