1. Suppose you need to prepare 131.0 mL of a 0.453 M aqueous solution of NaCl. What mass of NaCl do you need to use to make the solution? 2. Sugar is easily soluble in water and has a molar mass of 342.30 g/mol. What is the molar concentration of a 249.8 mL aqueous solution prepared with 72.9 g of sugar?
3. Calculate the percent by mass of a solution made from 15 g NaCl (the solute) and 66 g water. Units are optional.
4. Calculate the mass percent of a vinegar solution with a total mass of 95.25 g that contains 2.56 g of acetic acid.