In any chemical reaction, an insufficient quantity of any of the reagents will consequently limit the amount of product that may be formed.

true

false

i have a feeling this is a gay person trolling to make straights look bad.

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.