When 12.4 grams of kbr are dissolved in enough water to create a 170-gram solution, what is the solution's concentration, expressed as a percent by mass?

Answer : The concentration of solution in percent by mass is 7.29 %

Explanation :

Percent by mass : It means that the mass of solute present in the mixture and multiply by 100.

Given:

Mass of KBr = 12.4 g

Mass of solution = 170 g

Now we have to calculate the concentration of solution in percent by mass.

Therefore, the concentration of solution in percent by mass is 7.29 %

0.88m hope i am correct : )