Embarking on a chemical journey to fine-tune the vapor pressure of ethanol, we first delve into the world of mole fractions, calculating approximately 21.71 moles of ethanol based on its mass and molar mass. Raoult’s Law then takes center stage, guiding us through the intricacies of vapor pressure calculations. As the plot thickens, ethylene glycol enters the scene, prompting the unveiling of its mole fraction and the subsequent determination of its moles in the solution. This orchestrated dance of chemical calculations culminates in the revelation of the mass of ethylene glycol needed to elegantly modify the vapor pressure, a delicate performance that unveils the symphony of molecular interactions within the solution.