A nurse is preparing to administer ferrous fumarate 3 mg/kg PO 3 times a day to a toddler who weighs 22 lb. Available is ferrous fumarate drops 45 mg/0.6 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Step by step calculation: The child's weight is 22 lb. The medication dosage is 3 mg/kg. The available medication concentration is 45 mg/0.6 mL. Calculating the total dose in mg per dose: Convert the child's weight to kg: 22 lb ÷ 2.2 lb/kg = 10 kg Calculate the total dose per dose: 10 kg × 3 mg/kg = 30 mg Calculating the volume to administer per dose: Use the concentration of the medication: 30 mg ÷ (45 mg/0.6 mL) = 30 mg ÷ 75 mg/mL = 0.4 mL