Final answer:
To administer a dose of 50 mg Lasix using a 20 mg/mL concentration, the student should give 2.5 mL of the medication.
Step-by-step explanation:
The question asks how many mL of a medication to administer knowing the order, the concentration on hand, and using the provided conversion factor. To calculate the volume of Lasix to be given at a dosage of 50 mg when the available concentration is 20 mg/mL, you use the formula:
Dose ordered (mg) / concentration on hand (mg/mL) = Volume to give (mL)
In this case:
50 mg / 20 mg/mL = 2.5 mL
Therefore, the student should administer 2.5 mL of Lasix to deliver a dose of 50 mg.