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How many argon molecules have velocities between 250 m/s and 500 m/s?
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[QUOTE="baubletop, post: 4593630, member: 491372"] [h2]Homework Statement [/h2] A sealed bottle at 1 atm of pressure holds 1 mole of neon and 1 mole of argon gas at a temperature of 295K. The curves in the Figure ([url]http://phlnx3.pas.rochester.edu/webwork2_files/CAPA_Graphics/Gtype43/prob01a.gif[/url]) show the distributions of velocities of the molecules of each gas. Find the number of molecules of argon which have velocities between 250 m/s and 500 m/s. [h2]Homework Equations[/h2] KE = (3/2)kT P(v) dv [itex]\propto[/itex] 4πv^2 e^((-(1/2)mv^2)/kT) dv Molar Mass of Argon = 0.03995 kg/mol [h2]The Attempt at a Solution[/h2] Totally lost on how to set this one up. I get that I need some sort of bound on the probability of finding Argon between 250 and 500 m/s, and from there I can get an actual number, but for now I'm somewhat lost. The graph might be giving me the answer right in front of me but I'm also having a hard time reading it (it doesn't help that it's not labeled which curve is which element...). [/QUOTE]
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How many argon molecules have velocities between 250 m/s and 500 m/s?
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