Question

My answer is not coming up as an option. I was solving for moles of each, then adding them up and then dividing by mole frac of meth. But I must be doing something wrong please advise 

Z.90 auI
e. 3.69 atm
7.A mixture of methane and helium is placed in a 2.0 L flask at 27°C. The partial pressure of CH4 is 0.72 atm and the
partial pressure of helium is 0.22 atm. What is the mole fraction of methane?
PV nRT
PV
0.23
CHy2a
He.22
а.
Kmot
b. 0.29
R.T
0921944
0.50
с.
d. 0.77
618
.Z1
3.5
е.
Expand
Transcribed Image Text

Z.90 auI e. 3.69 atm 7.A mixture of methane and helium is placed in a 2.0 L flask at 27°C. The partial pressure of CH4 is 0.72 atm and the partial pressure of helium is 0.22 atm. What is the mole fraction of methane? PV nRT PV 0.23 CHy2a He.22 а. Kmot b. 0.29 R.T 0921944 0.50 с. d. 0.77 618 .Z1 3.5 е.

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