A nurse is preparing to administer 0.33% sodium chloride 120 mL IV to infuse over 30 min to a preschooler. 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 120 mL of sodium chloride. The infusion time is 30 minutes. Calculating the flow rate in mL/hr: Convert the infusion time to hours: 30 minutes ÷ 60 minutes/hour = 0.5 hours Divide the total volume by the infusion time: 120 mL ÷ 0.5 hours = 240 mL/hour