Final answer:
The percent mass/mass of a solution requires the mass of the solute and the total mass of the solution. Without this information, we cannot calculate the m/m % for the stock solution with a density of 1.05 g/mL.
Step-by-step explanation:
To calculate the percent mass/mass (m/m %) of a stock solution with a density of 1.05 g/mL, you can use the formula:
% m/m = (mass of solute / total mass of solution) × 100
However, additional information is needed to accurately calculate the m/m %. Specifically, you need to know the amount of solute in grams and the total mass of the solution, which might be calculated from the given density if the volume of the solution is known. Thus, without the mass of the solute or total solution volume, it is not possible to give a numerical answer to this question.
For example, let's consider a hypothetical solution where 36.5 g of NaCl is dissolved in 355 g of water. In this case:
% m/m = (36.5 g / 355 g) × 100 = 10.28%
This represents the mass/mass percent concentration of the solution.