Final answer:
The mass/volume percent of the NaCl solution is 2.94%.
Step-by-step explanation:
To calculate the mass/volume percent of a NaCl solution, we need to divide the mass of NaCl by the volume of the solution and then multiply by 100%. In this case, we have 128 g of NaCl dissolved in 4.36 L of water. To convert L to mL, we multiply 4.36 by 1000, which gives us 4360 mL. Therefore, the mass/volume percent of the NaCl solution is:
% m/v = (mass of NaCl / volume of solution) x 100%
% m/v = (128 g / 4360 mL) x 100% = 2.94%