What is the mass of a 10.0% blood plasma sample that contains 2.50 g of dissolved solute?

Question

Quizplus · Accepted Answer

The mass of the blood plasma sample can be found by using the percentage concentration formula: $\text{mass of solute} = \text{percentage concentration} \times \text{total mass of solution}$. Rearranging this formula to solve for the total mass of the solution gives $\text{total mass of solution} = \frac{\text{mass of solute}}{\text{percentage concentration}}$. Substituting the given values ($2.50 g$ of solute and $10.0\%$ concentration) gives $\text{total mass of solution} = \frac{2.50 g}{0.10} = 25.0 g$.

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