The flow rate for the ordered IV infusion is approximately 83.33 mL/hr.
To calculate the flow rate in mL/hr for the ordered intravenous (IV) infusion of 1.5 L of normal saline (NS) over 18 hours, you can use the following formula:
![\[ \text{Flow rate (mL/hr)} = \frac{\text{Volume (mL)}}{\text{Time (hours)}} \]](https://img.qammunity.org/2024/formulas/chemistry/college/ry17l2nl1mumkg40mixf4jahmqn5q9v1el.png)
Substitute the given values:
![\[ \text{Flow rate} = \frac{1500 \, \text{mL}}{18 \, \text{hours}} \]](https://img.qammunity.org/2024/formulas/chemistry/college/4zp3n8un1w3m627wdwml8deelqaotk4uex.png)
![\[ \text{Flow rate} \approx 83.33 \, \text{mL/hr} \]](https://img.qammunity.org/2024/formulas/chemistry/college/zgpay5w29sgsvgsb6c6fefcl6thg6uyh7p.png)
Therefore, the flow rate for the ordered IV infusion is approximately 83.33 mL/hr.