Answer:
c. 26.9%
Explanation:
1st) To calculate the percentage by mass of a solution, it is necessary to use the grams of solue and the grams of solution.
The information given in the exercise is:
- Mass of solute (HCl): 36.0g
- Mass of solvent (water): 98.0g
We need the mass of solution, so it is necessary to add the mass of solute to mass of solvent, that is the mass of solution:
[tex]\begin{gathered} \text{ Mass of solution = Mass of solute + Mass of solvent} \\ \text{ Mass of solution = }36.0g\text{ + }98.0g \\ \text{ Mass of solution = 134.0g} \end{gathered}[/tex]2nd) Now we have to replace the values in the formula to calculate the percentage by mass of the solution:
[tex]\begin{gathered} \text{ Percent by mass =}\frac{\text{ Mass of solute}}{\text{ Mass of solution}}*100 \\ \text{ Percent by mass = }\frac{36.0g}{134.0g}*100 \\ \text{ Percent by mass = 26.9}\% \end{gathered}[/tex]Finally, the percentage by mass of the solution is 26.9%.
