The vapor pressure of a solution is proportional to its mole fraction. What is the mole fraction of ethanol in a mixture of 20. g of ethanol

Question

The vapor pressure of a solution is proportional to its mole fraction. What is the mole fraction of ethanol in a mixture of 20. g of ethanol (C₂H₆O) and 50. g of propanol (C₃H₈O)?

Answer 1

Mole fraction of ethanol is just divide the moles of ethanol by total moles of the mixture.

Find the moles of ethanol and propanol separately by dividing the grams by the molar mass.

Ethanol molar mass 46 grams/mol and propanol should be 60 grams/mol