The label on a bottle of medicine reads "Each 5 mL teaspoonful contains glucose, 1.87 g; levulose, 1.87 g; and phosphoric acid, 21.2
mg."
a. Find the amount of phosphoric acid in the recommended dosage of two teaspoons.
b. If the bottle contains 3
ounces, find the quantity of phosphoric acid in the bottle. left parenthesis 1 oz almost equals 30 mL; 1 tsp almost equals 5 mL right parenthesis
To find the amount of phosphoric acid in the recommended dosage of two teaspoons:
1. Identify the amount of phosphoric acid in one teaspoon: 21.2 mg.
2. Multiply the amount in one teaspoon by two to find the amount in two teaspoons:
21.2 mg * 2 = 42.4 mg.
So, the recommended dosage of two teaspoons contains 42.4 mg of phosphoric acid.
To find the quantity of phosphoric acid in the entire bottle (3 ounces):
1. Convert 3 ounces to milliliters using the given conversion rate:
3 ounces * 30 mL/1 oz = 90 mL.
2. Divide the total milliliters by the amount of milliliters in one teaspoon to find the number of teaspoons in the bottle:
90 mL / 5 mL = 18 teaspoons.
3. Multiply the number of teaspoons by the amount of phosphoric acid in one teaspoon to find the total amount of phosphoric acid in the bottle:
18 teaspoons * 21.2 mg = 381.6 mg.
So, the quantity of phosphoric acid in the bottle is 381.6 mg.