Final answer:
To set the I.V. pump for Heparin 20,000 units in 500 mL D₅W to run at 1,000 units/hour, calculate the flow rate by dividing the mL by L and units by hours.
Step-by-step explanation:
To set the I.V. pump for Heparin 20,000 units in 500 mL D₅W to run at 1,000 units/hour, you will need to calculate the flow rate. First, convert the mL to L by dividing 500 mL by 1000 to get 0.5 L. Then, divide 20,000 units by 1,000 units/hour to get 20 hours. Finally, divide 0.5 L by 20 hours to get the flow rate of 0.025 L/hour. Set the I.V. pump to run at this flow rate.