Final answer:
The average rate of formation of substance B between 0.00 s and 10.0 s is 0.0188 mol L-1 s-1. The instantaneous rate of formation at 15.0 s is 0.012 mol L-1 s-1.
Step-by-step explanation:
The student's question pertains to determining the average rate of formation for substance B between 0.00 s and 10.0 s, as well as the instantaneous rate of formation at 15.0 s, based on given reaction rate data. For compound B, the average rate of formation between 0 - 10 s is calculated using the data provided for that time interval. The instantaneous rate of formation at 15.0 s is specifically given as part of the question's provided data.
To calculate the average rate of formation of B between 0.00 s and 10.0 s, we analyze the rate of change of B's concentration over that time period. Using the information provided, we can directly take the value given for the average rate of B formation between 0 and 10 seconds, which is 0.0188 mol L-1 s-1.
The instantaneous rate at a specific time point, such as 15.0 s, represents the rate of reaction at that precise moment. The value for the instantaneous rate of formation of B at 15.0 s is reported to be 0.012 mol L-1 s-1.