Step-by-step explanation:
The percent by mass of a solution is defined as the mass of solute divided by the mass of solution multiplied by 100.
mass % = mass of KCl/mass of solution * 100 = 1.14 %
We have to find the mass of KCl that exist in a 20.3 g of solution with a concentration of 1.14 % by mass.
20.3 g of solution * (1.14 g of KCl/100 g of solution) = 0.231 g of KCl
(20.3 g solution/1) * (1.14 g KCl/100 g solution) = 0.231 g KCl
Answer: there are 0.231 g of KCl