Final answer:
To calculate the mL/hr, divide the given rate of units/hr by the number of units in 1 mL of the solution.
Step-by-step explanation:
To calculate the mL/hr, first, we need to find out how many units are in 1 mL of the solution. Since there are 20,000 units in 1000 mL, there are 20 units in 1 mL.
Now, we can use the given rate of 200 units/hr to find the mL/hr. If 200 units are running for 1 hour, then 1 unit will run for 1/200th of an hour.
Therefore, the mL/hr can be calculated as (1/200) × 1 = 0.005 mL/hr.