A solution was prepared by dissolving 26.0 g of kcl in 225 g of water. part a part complete calculate the mass percent of kcl in the solution.

10.4%

First, calculate the total mass by adding the masses together.

26.0 g + 225 g = 251 g

Now calculate the percentage of 251 that 26 is using division:

26 / 251 = 0.103585657 = 10.3585657%

So the mass percent of KCl is 10.4% (after rounding to 3 significant digits)