Question

When 9.6 grams of NaBr are dissolved in enough water to create a 165 gram solution what is the concentration expressed as a percent by mass

Answer 1

Answer:

5.8 %

Explanation:

% by mass = (mass of solute/mass of solution) × 100 %

Data:

    Mass of NaBr =    9.6 g

Mass of solution = 165    g

Calculation:

% by mass = (9.6 g/165 g) × 100 % = 5.8 %

Answer 2

Answer:

The concentration of sodium bromide solution as a percent by mass is 5.82%.

Explanation:

Percent 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 sodium bromide = 9.6 g

Mass of the solution prepared = 165 g

The concentration of solution as a percent by mass:

$\frac{9.6 g}{165 g}\times 100=5.82\%$