Answer to Question #110119 in General Chemistry for Lauren Barad

Question

A solution is prepared by dissolving 20g benzene in 100g carbon tetrachloride. What is the percent by mass of the solution?

a. 17%
b. 20%
c. 83%
d. 500%

Answer 1

Solution.

Mass= Mass of C₆H₆ + Mass of CCl₄;

Mass = 20g + 100g = 120g;

Mass % of  benzene = (20/120)×100% =17%;

Mass % of carbon tetrachloride = (100/120)×100% = 83%;

Answer: a. 17%.