Final answer:
To answer the student's question: healthcare professionals, including nurses, use unit conversion to calculate medication dosages accurately. One gram is equivalent to 1000 milligrams, so to administer a 0.2 g dose of aspirin, a nurse would need four 50 mg tablets.
Step-by-step explanation:
The question you asked revolves around a medication dosage calculation, which is a fundamental skill required in the healthcare field, particularly for nurses and other medical professionals. Converting from one unit of measurement to another ensures patients receive the correct dosage of medication. For example, with powdered medications like Ceftriaxone, the nurse must calculate the correct amount of the medication to reconstitute the powder into a solution for injection. If a nurse has 50 mg aspirin tablets and needs to administer a 0.2 g (200 mg) dose of aspirin, they will need to use four tablets to meet the required dosage. This is because 0.2 g of any substance is equivalent to 200 mg. The conversion is simple: 1 gram (g) is equal to 1000 milligrams (mg), so the nurse uses this conversion factor to calculate the number of tablets needed.