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Answer:
Gold is different than other because they are homogenous mixture.
Answer:

Explanation:
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At first, we compute liquid-phase molar fractions:

Now, by means of the fugacity concept, for hexane, for instance, we have:

In this manner, at 25 °C the vapor pressure of hexane and heptane are 0.198946 atm and 0.013912 atm repectively, thus, the total pressure is:

Finally, from the hexane's fugacity equation, we find its mole fraction in the vapour as:

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Empirical Formula = C20 H60 HG1 S1 O4 (numbers should be in subscript)
Percent Composition =
MG = 43%
S = 56.8%