The production of water proceeds according to the following equation. 2H2(g) + O2(g) Right arrow. 2H2O(g) Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

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.