Sagot :
SOLUTION:
Step 1: List the given values.
[tex]\begin{aligned} & mass_{\text{solute}} = \text{20.0 g} \\ & V_{\text{solution}} = \text{800.0 mL} \end{aligned}[/tex]
Step 2: Calculate the percent by mass per volume.
[tex]\begin{aligned} \%(m/v) & = \frac{mass_{\text{solute}}}{V_{\text{solution}}} \times 100\% \\ & = \frac{\text{20.0 g}}{\text{800.0 mL}} \times 100\% \\ & = \boxed{2.50\%} \end{aligned}[/tex]
Hence, the percent by mass per volume concentration of the solution is 2.50%.
[tex]\\[/tex]
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