A nurse is preparing to administer 0.9% sodium chloride 100 mL IV to infuse over 15 min. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Step by step calculation: The nurse needs to administer 100 mL of sodium chloride. The infusion time is 15 minutes. Calculating the flow rate in mL/hr: Convert the infusion time to hours: 15 minutes ÷ 60 minutes/hour = 0.25 hours Divide the total volume by the infusion time: 100 mL ÷ 0.25 hours = 400 mL/hour