Question

the label on a bottle of medicine reads \each 5 ml teaspoonful contains glucose, 1.87 g; levulose, 1.87 g; and phosphoric acid, 22.1 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. (1 oz ≈ 30 ml; 1 tsp ≈ 5 ml) a. there are mg of phosphoric acid in two teaspoons. (simplify your answer. type an integer or a decimal.)

Explanation:

Step1: Calculate amount for two teaspoons

Since 1 teaspoon has 22.1 mg of phosphoric - acid, for 2 teaspoons, we multiply by 2.
$22.1\times2$

Step2: Get the result

$22.1\times2 = 44.2$

Step3: Convert ounces to mL for part b

Given 1 oz $\approx30$ mL and the bottle has 3 oz, so the volume of the bottle in mL is $3\times30=90$ mL.

Step4: Calculate number of teaspoons in the bottle

Since 1 tsp $\approx5$ mL, the number of teaspoons in 90 mL is $\frac{90}{5}=18$ tsp.

Step5: Calculate amount of phosphoric - acid in the bottle

Since 1 tsp has 22.1 mg of phosphoric - acid, for 18 tsp, we multiply by 18.
$22.1\times18 = 397.8$

Answer:

a. 44.2
b. 397.8