A nurse is preparing to administer cefazolin 500 mg IM to a client. Available is cefazolin powder 500 mg vial. After reconstitution, the concentration available is cefazolin 330 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

The nurse should administer 1.5 mL of cefazolin solution. Here's the calculation: Desired dose: 500 mg Concentration after reconstitution: 330 mg/mL We can find the volume to administer by dividing the desired dose by the concentration and rounding to the nearest tenth: Volume to administer (rounded to nearest tenth) = Dose / Concentration = 500 mg / 330 mg/mL = 1.5 mL (rounded to nearest tenth) Therefore, the nurse should administer 1.5 mL of the reconstituted cefazolin solution.