Sample Exercise #1

• What is the % (m/m) concentration of ammonia in a solution made by dissolving 3.9 g of ammonia in 65.0 g of water?
• A cleaning solution is made by mixing 15.4 mL of ammonia with 78.2 mL of water. What is the volume percent of ammonia in the solution?
• How many grams of bromine are required to make 50.0 g of a 7.00% (m/m) solution of bromine?
• A certain bottle of vodka is 40.0% (m/v) alcohol. How much alcohol is present in a 45 mL shot?