A gaseous mixture of CO, CO₂, CH₄, and N₂ is analyzed with a gas chromatograph (see Problem 3.26). The output appears on a strip-chart recorder, as shown here.

For each of the three species, the area under the peak is approximately proportional to the number of moles of the indicated substance in the sample. From other information, it is known that the molar ratio of methane (CH4) to nitrogen is 0.200.

(a) What are the mole fractions of the four species in the gas?

(b) What is the average molecular weight of the gas?

Transcribed Image Text:

CO Area = 40 CH4 Area = 25 CO₂ Area = 80