What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O?
duplicate post.
To calculate the percent by mass, we need to determine the mass of the solute (NaCl) and the mass of the solution (NaCl + H2O).
Step 1: Calculate the mass of the solute (NaCl)
The mass of NaCl is given as 3.55 g.
Step 2: Calculate the mass of the solution (NaCl + H2O)
The mass of H2O is given as 88 g.
Mass of solution = mass of NaCl + mass of H2O
Mass of solution = 3.55 g + 88 g
Mass of solution = 91.55 g
Step 3: Calculate the percent by mass
Percent by mass = (mass of solute / mass of solution) x 100
Now we can substitute the values into the formula.
Percent by mass = (3.55 g / 91.55 g) x 100
Percent by mass = 3.88%
Therefore, the percent by mass of 3.55 g NaCl dissolved in 88 g H2O is approximately 3.88%.