Answer:
8.75 g
Explanation:
The mass of tolnaftate must be 7 % of the total mass.
Mass = 0.07 × 125 g = 8.75 g
You need to use 8.75 g of tolnaftate powder.
Answer:
8.75 grams of tolnaftate powder is needed.
Explanation:
Mass by mass percentage (w/w) % : It is the percentage of solute present in 100 grams of solution.
[tex](w/w)\%=\frac{\text{Weight of solute}}{\text{Weight of the solution}}[/tex]
Given mass of the solution = 125 g
Mass of the solute required = x
Mass by mass percentage of the solution = 7%
[tex]7\%=\frac{x}{125 g}\times 100[/tex]
[tex]x=\frac{7\times 125 g}{100}=8.75 g[/tex]
8.75 grams of tolnaftate powder is needed.
