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

The mass percentage of the solution is 3.88%.

Step-by-step 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}}* 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\%)=(3.55 g)/(91.55 g)* 100=3.88\%`