What mass of LiF is contained in 18.66 g of a 20.0% by mass solution of LiF in water?
A) 20.00 g
B) 21.15 g
C) 3.73 g
D) 1.50 g
E) 12.44 g

Question

Quizplus · Accepted Answer

If the solution is 20.0% by mass, it means that 20.0 g of LiF is present in 100 g of solution. Therefore, the mass of LiF in 18.66 g of solution can be calculated as:
Mass of LiF = (20.0 g/100 g) x 18.66 g = 3.73 g
Thus, the mass of LiF in the given solution is 3.73 g.

What Mass of LiF Is Contained in 18