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A mixture of carbon dioxide and nitrogen gases, in a 7.69 L flask at 36 °C, contains...

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Chemistry

A mixture of carbon dioxide andnitrogen gases, in a 7.69 L flaskat 36 °C, contains 10.4 grams ofcarbon dioxide and 7.77 grams ofnitrogen. The partial pressureofnitrogen in the flask is (?) atm and the totalpressure in the flask is (?) atm

thanks in advance

Answer & Explanation Solved by verified expert
3.9 Ratings (592 Votes)

CO2 moles = 10.4 / 44 = 0.2364

N2 moles = 7.77 / 28 = 0.2775

total moles = 0.5139

mole fraction of N2   = moles of N2 / total moles

                               = 0.2775 / 0.5139

                                = 0.540

V = 7.69 L

T = 36 + 273 = 309 K

P V = n R T

P x 7.69 = 0.5139   x 0.0821 x 309

P = 1.695 atm

total pressure = 1.695 atm

partial pressure of N2 = mole fraction of N2 x total pressure

                                    = 0.540 x 1.695

                                     = 0.916 atm

partial pressure of N2 = 0.916 atm
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