5. What is the percent yield when 7.25g of H2SO4 reacts with excess Al(OH)3 to produce 6.43 g of Al2(SO4)3 and water. 3 H2SO4 + 2 Al(OH)3  Al2(SO4)3 + 6 H2O

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.

the correct answer to this question is 2