Mole Fraction:This is the ratio of moles of one component to the total moles in the solution – like comparing how many chocolate chips there are compared to all other ingredients in our cookie dough.
Mass-Mass Solution: A type of solution where both solute and solvent are measured in terms of their mass – like weighing out all your cookie ingredients.
Percent Composition: The percentage by mass contributed by each element in a compound – like figuring out what percent of your cookies is made up from each ingredient.