You are asked to prepare a 0.6500 M solution of aluminum nitrate. You find that you have only 50.00 g of the solid. If 2.500 L of the prepared solution is required, how much more aluminum nitrate would you need?

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.

its first and third is your answer i did the qustion the fourth isnt right

yes

ya te ayud espera