Moles, Density, Fraction & Concentration on Chemical Engineering related Questions and Answers

Question :   A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added? 1. 25 g 2. 75 g 3. 100 g 4. 150 g Answer :   4 - 150 g