a solution is 18.4% m/v. what is the mass of dissolved solid in 125 ml of the solution?\n82.8 g\n1995.7…

Explanation:

Step1: Recall mass - volume percentage formula

The mass - volume percentage ($m/v$) is defined as $\text{mass - volume}%=\frac{\text{mass of solute (g)}}{\text{volume of solution (mL)}}\times100$. We can re - arrange it to solve for the mass of the solute: $\text{mass of solute}=\frac{\text{mass - volume}%}{100}\times\text{volume of solution}$.

Step2: Substitute given values

We are given that the mass - volume percentage is $18.4%$ and the volume of the solution is $125$ mL. Substituting these values into the formula: $\text{mass of solute}=\frac{18.4}{100}\times125$. First, $\frac{18.4}{100}=0.184$. Then, $0.184\times125 = 23.0$ g.

Answer:

E. 23.0 g