A nurse is preparing to administer morphine 4 mg subcutaneous to a client. Available is morphine 10 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 0.4 mL of morphine. Here's the calculation: Desired dose: 4 mg Concentration of available morphine: 10 mg/mL We can find the volume to administer by dividing the desired dose by the concentration and rounding to one decimal place: Volume to administer (rounded to one decimal) = Dose / Concentration = 4 mg / (10 mg/mL) = 0.4 mL Therefore, the nurse should administer 0.4 mL of the morphine solution.