1. I have a vitamin supplement which has 200mg of Vitamin A (Chemical name: Retinol, formula C20H30O ) dissolved in 10 milliliters of ethanol. What is the mass fraction of Vitamin A in this supplement? What is the mole fraction of Vitamin A in the supplement? 2. I mix two fluids together, and 1 use the same mass of each fluid. They are completely miscible; in fact, the two chemicals are isomers. What is the composition of the mixture on a molar basis (i.e., report as molar fraction of Chemical A)? Give a numerical answer and a written explanation of how you arrived at it, but do not use any equations. 3. Air is generally assumed to be 79% nitrogen and 21% oxygen on a volume basis. What is the composition of air on a molar basis? This problem is relatively trivial to solve if you look up a density for these gases. Don't. Instead, try starting with the ideal gas law.... 4. I'm trying to mix up a drink for a party. It's a mixture of Guinness, which is 4.3% ethanol in water by volume, and Irish Whiskey, which is 80% ethanol in water by volume. I want to combine these, and create a drink with is 16% ethanol by volume. I also want one liter of this drink. Assume that the solutions will behave as ideal solutions, and determine the volume of Guinness and Irish Whiskey that I should combine, expressed in liters