A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 12 hr. 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.)

To calculate the infusion rate for an IV, you would divide the total volume of IV fluid (1,000 mL) by the time in hours over which the infusion is to run (12 hr). This calculation gives you the rate in mL/hr. So, for 1,000 mL of sodium chloride to be infused over 12 hours, the calculation is 1,000 divided by 12, which equals approximately 83.33 mL/hr. When rounding to the nearest whole number, the IV pump should be set to deliver 83 mL/hr.