Asked by Alexa
A gas mixture composed of helium and argon has a density of 0.846g/L at a 734mmHg and 298 K.
What is the composition of the mixture by volume?
What is the composition of the mixture by volume?
Answers
Answered by
DrBob222
The general gas law is PV = nRT. n = grams/molar mass which makes this come out to be PV = gRT/M and this can be rearranged to P = gRT/MV where M is molar mass or P*M = gRT. Substitute and solve for M = molar mass. I get about 21 but you need a more accurate number than that estimate.
The let X = fraction He atomic mass 4.003
and 1-X = fraction Ar = atomic mass 39.95
X(4.003) + (1-X)*39.95 = approx 21
Solve for X and 1-X to fractions and multiply by 100 to convert to %.
The let X = fraction He atomic mass 4.003
and 1-X = fraction Ar = atomic mass 39.95
X(4.003) + (1-X)*39.95 = approx 21
Solve for X and 1-X to fractions and multiply by 100 to convert to %.
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