calculate the mole fraction of a fractional distillation? How do I find the mole fractions of different distillations given only the refractive index, the temperature and which the distillation was acquired, and the makeup on the original solution before distillation?

the lab manual says to use P= (px * mol frac x)+(py * mol frac y)

but i don't know how I can find their partial pressure given that I don't know their mole fractions of the distillation since partial P=mole frac * vapor pressure.

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Trinidad TremblayLv2

13 Dec 2019

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How do I get the correct pressure of hydrogen gas? Also is the question before this one correct?

I attached pics of my experimental results as well

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