A sample of vinegar is 7.00 mass % acetic acid (60.052 g/mol) in water. What is the mole fraction of acetic acid in the vinegar sample? What is the molality of the vinegar sample?

Describe the preparation of a mixture containing ethanol and water where X_ethanol = 0.27 and X_water = 0.73

Calculate the molality and mole fraction of an aqueous solution that is 12.5 % NaOH by mass.

Calculate the mole fraction of a solution prepared by dissolving 15.6 mL of ethanol (CH₃CH₂OH) in 250.00 mL of water at room temperature. Assume that the final volume is the sum of each component. The densities of ethanol and water are 0.789 g/mL and 1.00 g/mL, respectively.