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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