Final answer:
To calculate the duration the IV bag will last, divide the total volume of the IV fluid (1000 mL) by the flow rate (75 mL/hr), giving approximately 13.333 hours, which is rounded to 13 hours.
Step-by-step explanation:
To determine how long the IV bag will last, we need to calculate the time it takes for 1L (1000 mL) to be administered at a rate of 75 mL/hr. The calculation is as follows:
Total volume of IV fluid (V) = 1000 mL
Flow rate (R) = 75 mL/hr
Time (T) = V / R
Time (T) = 1000 mL / 75 mL/hr
Time (T) = 13.333 hours
When rounded to the nearest whole hour, the IV will last approximately 13 hours.