Final answer:
The average rate of change of the amount of an element over a period of time can be calculated by determining the difference in the amount of the element at the beginning and end of the time period, and then dividing this difference by the duration of the time period. In this case, the average rate of change of the element over the 10-minute experiment is approximately 0.032 mol L-1 minute-1.
Step-by-step explanation:
The average rate of change of the amount of an element over a period of time can be calculated by determining the difference in the amount of the element at the beginning and end of the time period, and then dividing this difference by the duration of the time period.
In the given information, the average rate of change of the amount of the element between 0 - 10 seconds is 0.0375 mol L-1 s-1, and between 10 - 20 seconds is 0.0265 mol L-1 s-1. To find the average rate of change of the amount of the element over the entire 10-minute experiment, you can convert the given rates to mol L-1 minute-1 and then take the average of the two rates.
Therefore, the average rate of change of the amount of the element over the 10-minute experiment is the average of the rates 0.0375 mol L-1 s-1 and 0.0265 mol L-1 s-1, which is approximately 0.032 mol L-1 minute-1.