Question

In a mixture containing only KCl and Ba(NO₃)₂, what is the mass percent of KCl if a 15 g sample contains 9 g of KCl?

a) 40%
b) 60%
c) 75%
d) 100%

Answer 1

The mass percent of KCl in the mixture is 60%.

Step-by-step explanation:

To find the mass percent of KCl, we need to determine the total mass of the mixture and then calculate the mass of KCl as a percentage of the total mass. In this case, we know that the total mass of the mixture is 15 g and the mass of KCl is 9 g.

To calculate the mass percent, divide the mass of KCl by the total mass of the mixture and multiply by 100:

Mass percent of KCl = (mass of KCl / total mass of mixture) × 100 = (9 g / 15 g) × 100 = 60%

Therefore, the mass percent of KCl in the mixture is 60% (option b).