A mixture of helium and neon gases at 317 K contains 3 times the number of helium atoms as neon atoms. The concentration (𝑛/𝑉) of the mixture is found to be 0.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium?

Question

A mixture of helium and neon gases at  317  K contains  3  times the number of helium atoms as neon atoms. The concentration  (𝑛/𝑉)  of the mixture is found to be  0.150  mol/L. Assuming ideal behavior, what is the partial pressure of helium?

DrBob222 · Accepted Answer

Calculate the total pressure of the 1 L as PV = nRT V = 1 L, n = 0.150, R = 0.08205, T = 317 K Ptotal = 3.9 atm P_He = X_He x P_total where X_He = 3/4 or 0.75 P_He = 0.75 x 3.9 atm = ?