Subject science! distillation a. is the best method for separating a solid and a liquid b. uses boiling points to separate different liquids c. separates substances based on particle size d. causes a chemical change

Option (B) is the correct answer.

Explanation:

When two different liquids of different boiling point are mixed and boiled together then liquid with lower boiling point will change into vapors readily. These vapors upon cooling will be collected and hence separated out in a separate container.

This process of separation is known as distillation.

For example, a solution containing diethyl ether (boiling point and dioxane (boiling point ) can be separated out by distillation.

Thus, we can conclude that distillation uses boiling points to separate different liquids.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%