Question

A mixture of helium and neon gases at 255255 K contains 33 times the number of helium atoms as neon atoms. The concentration (?/?)(n/V) of the mixture is found to be 0.1500.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium

Answer 1

I am assuming that there is typing mistake in describing the temperature and the concentration of the mixture. Considering the temperature to be 255 K and the concentration 0.15 mol/L and 3 times the number of helium atoms as neon atoms.

Given in the mixture contains 30 times the number of helium adooms as neon atoms. Temperature, T = 255k Total concentration, ca 0.15 mol/L we from the data given, it is known that for every I mole of Ne there is 3 motes of He for a total of 4 moles. concentration of Helium a Total concentration/more fraction) of Helium. / Che ² cx 2 = 0.15 x 21 z 0.1125 mol/L using the ideal gas law, PNEURT Ретр-Т гр. СRT The = CRT = 0.1125 x 0,0821 * 255 = 2.355 atm.