Answer: -
37.5 g of NaCl are in 250 g of a 15.0% (by weight) solution.
Explanation: -
Total mass = 250 g
Percentage of NaCl = 15.0 %
= [tex] \frac{Number of grams of NaCl present}{total mass} [/tex]
Thus [tex] \frac{15}{100} [/tex] = [tex] \frac{Number of grams of NaCl present}{250g} [/tex]
Number of grams of NaCl present = [tex] \frac{15 x 250g}{100} [/tex]
= 37.5 g
