Big asked in Science & MathematicsChemistry · 11 months ago

Amixture of oxygen andcarbon dioxide gases at a total pressure of 731 mm Hg, contains 3.31 grams of oxygen and 4.89 grams of carbon dioxide.?

Update:

PO2 =____ mm Hg

PCO2 = ____mm Hg

Update 2:

A mixture of helium and neon gases contains helium at a partial pressure of 669 mm Hg and neon at a partial pressure of 281 mm Hg. What is the mole fraction of each gas in the mixture?

XHe =

XNe =

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  • 11 months ago
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    (3.31 g O2) / (31.99886 g O2/mol) = 0.103441 mol O2

    (4.89 g CO2) / (44.00964 g CO2/mol) = 0.111112 mol CO2

    PO2 = (731 mm Hg) x (0.103441 mol O2) / (0.103441 mol + 0.111112 mol) = 352 mmHg

    PCO2 = (731 mm Hg) - (352 mmHg) = 379 mmHg

    ---------------------------

    (669 mmHg He) / (669 mmHg + 281 mmHg) = 0.704 (the mole fraction of He)

    1 - 0.704 = 0.296 (the mole fraction of Ne

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