18. Arrange the following aqueous solutions each of strength 0.1 molarity in order of increasing freezing and boiling point justify your answer C2H5OH, Ba3(PO4)2,Na2SO4,KCl, Li3PO4

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.

c, liquids evaporate, creating a gas