g Iron(III) oxide reacts with carbon monoxide to produce elemental iron and carbon dioxide. If 150 g of iron(III) oxide react with excess carbon monoxide and 87.9 g of iron is produced (actual yield), what is the percent yield

h let me think

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.