Final answer:
To treat a Trichomonas vaginalis infection with a prescription of 1 gram of metronidazole, when tablets are available in 500 mg, the nurse should administer two tablets.
Step-by-step explanation:
The student's question relates to medication dosage calculation. If a client with a Trichomonas vaginalis infection is prescribed metronidazole (Flagyl) 1 gram, and the medication is available in 500 mg tablets, the nurse should administer two tablets to achieve the required 1 gram dosage. Since 1 gram is equal to 1000 mg, and each tablet contains 500 mg, dividing 1000 mg by 500 mg per tablet gives us exactly 2 tablets (1000 mg ÷ 500 mg/tablet = 2 tablets).