Answer
a. 10. g of amino acids
b. 20. g of amino acids
Work Step by Step
a.
$4.0\%$ (m/v) $ amino \space acids $ solution : $$ 4.0 \space g \space amino \space acids = 100 \space mL \space solution$$
$$250 \space mL \space solution \times \frac{4.0 \space g \space amino \space acids}{100 \space mL \space solution} = 10. \space g \space amino \space acids $$
b. Since the patient receives this 250 mL solution two times each day, we can just multiply the mass by 2.
$$10. \space g \space amino \space acids \times 2 = 20. \space g \space amino \space acids $$
