2 H 2 O 2 ⟶ 2 H 2 O + O 2 If you collect 4.64 mL of O 2 at 298 K and 1.00 atm over 60.0 seconds from a reaction solution of 4.90 mL, what is the initial rate of the reaction?

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.