Question

I need to know how to do #8

Answer 1

3.55 g NaCl + 88 g Water = 91.55 g total
3.55 g NaCl/91.55 g total x 100 = 3.88%
Simple stoichiometry

Answer 2

Answer:

The mass percentage of the solution is 3.88%.

Explanation:

Percentage by mass (w/w%) : The percentage mass or fraction of mass of the of solute present in total mass of the solution.

$w/w\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

Mass of solute that is NaCl = 3.55 g

Mass of solvent that is water = 88 g

Mass of the solution = Mass of solute + Mass of solvent

 =  3.55 g + 88 g = 91.55 g

Solution's percentage by mass:

$(w/w\%)=\frac{3.55 g}{91.55 g}\times 100=3.88\%$