FWS asked in Science & MathematicsChemistry · 2 months ago

What is the partial pressure (in kilopascals) of each gas in the mixture?

A gas mixture for use in some lasers contains 5.00% by weight HCI, 1.00% H2 and 94.0% Ne.The mixture is sold in cylinders that have volume of 49.0 L and a pressure of13,800 kPa at 21.0C

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  • 2 months ago

    In 100 g of the gas, you would have

    5 g HCl / 36.46 g/mol = 0.137 mol HCl

    1 g H2 / 2.016 g/mol = 0.496 mol H2

    94 g Ne / 20.18 g/mol = 4.66 mol Ne

    Mole fraction HCl = 0.137 mol / 5.291 mol = 0.0259

    Mole fraction H2 = 0.496 mol / 5.291 = 0.0937

    Mole fraction Ne = 4.66 / 5.291 = 0.881

    Partial pressure HCl = 13800 kPa X 0.0259 = 357 kPa

    Partial pressure H2 = 13800 kPa X 0.0937 = 1293 kPa

    Partial pressure Ne = 13800 kPa X 0.881 = 12158 kPa

    (All answers should be expressed with 3 significant figures. Round appropriately)

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