Nail polish remover is essentially a mixture of water and a chemical called acetone. How much pure acetone must be combined with a solution that is 10% acetone to make 30 oz of a 37% solution?
A) 15 oz
B) 9 oz
C) 21 oz
D) 14 oz

Question

Quizplus · Accepted Answer

To create a 37% solution from a 10% solution by adding pure acetone, we can use the equation: (amount of pure acetone) + 0.10(amount of 10% solution) = 0.37(total amount of solution). Let x be the amount of pure acetone added. Since the total solution is 30 oz, the amount of 10% solution is (30 - x) oz. The equation becomes: x + 0.10(30 - x) = 0.37(30). Solving for x gives x = 9 oz.

Nail Polish Remover Is Essentially a Mixture of Water and a Chemical