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A Solution of hexane and heptane at 30.0C with a mole fraction of .305 has a vapor pressure of 95.0 torr and a vapor-phase hexane mole fraction of .555. Find the vapor pressures of pure hexande and pure heptane at 30.0C.
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An 80-proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in 750mL of brandy?
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