A solution contains 15 ppm of benzene. The density of the solution is 1.00 g/mL. This means that __________.
A)there are 15 mg of benzene in 1.0 L of this solution
B)100 g of the solution contains 15 g of benzene
C)100 g of the solution contains 15 mg of benzene
D)the solution is 15% by mass of benzene
E)the molarity of the solution is 15

Question

Quizplus · Accepted Answer

Parts per million (ppm) is a unit of concentration that indicates the number of units of a substance per million units of the solution. In this case, there are 15 ppm of benzene in the solution, which means that there are 15 parts of benzene for every 1 million parts of the solution. The density of the solution is 1.00 g/mL, which means that 1 L of the solution weighs 1000 g. Therefore, there are 15 mg (15 ppm x 1000 g) of benzene in 1 L of this solution.

A Solution Contains 15 Ppm of Benzene