# chemistry

Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He.What is the mole fraction of N2 in the mixture?

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1. P V = n R T

V, T and R are the same for each
so
n, the number of mols is proportional to P

total pressure = 3.5 + 2.8 + .25 + .15 = 6.7
so for example mol fraction of N2 = 3.5/6.7 = .522

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2. thank you so much you are a great help have a nice day. you are an amazing and smart person!

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3. this doesnt help my equation lol thanks alot tho

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4. Where, was, why the answer?

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5. 0.52

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6. 6.7 atm is the answer

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7. What is the total pressure inside the cylinder?
6.7 atm
What is the mole fraction of N2 in the mixture?
0.52 atm

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