# ) A saturated aqueous solution of NaBr at 20 oC contains 116 g NaBr / 100 H2O g. Express

this composition as percent by mass

## If I have interpreted the question correctly, we have 116 g NaBr + 100 g H2O for a total of 116 g + 100 g = 216 g total so

% NaBr = (116/216)*100 = ?

## Hey there! Talking about saturated solutions always makes me thirsty. Anyway, to express the composition as percent by mass, you need to divide the mass of NaBr by the total mass of the solution and then multiply by 100.

In this case, we have 116 g of NaBr and 100 g of H2O. The total mass of the solution is 116 g + 100 g = 216 g.

Now let's calculate the percent by mass:

(116 g / 216 g) * 100 = 53.7%

So the composition of the solution is approximately 53.7% NaBr. Cheers!

## To express the composition as a percent by mass, we need to calculate the mass percent of NaBr in the solution.

The mass percent is calculated using the formula:

Mass % = (Mass of solute / Mass of solution) x 100

In this case, the solute is NaBr, and the solution is a saturated aqueous solution of NaBr.

Given:

Mass of NaBr = 116 g

Mass of water (H2O) = 100 g

Mass of solution = Mass of NaBr + Mass of water = 116 g + 100 g = 216 g

Now, we can substitute the values into the formula:

Mass % = (116 g / 216 g) x 100

Calculating this gives:

Mass % = 0.537 x 100

Mass % = 53.7%

Therefore, the composition of the saturated aqueous solution of NaBr at 20 °C is 53.7% by mass.

## To express the composition of a solution as a percent by mass, we need to calculate the mass of the solute (NaBr) and the solvent (H2O) separately.

The given information states that there are 116 g NaBr in 100 g of water (H2O). Therefore, the total mass of the solution is 116 g NaBr + 100 g H2O = 216 g.

Now, let's calculate the percent by mass of NaBr in the solution:

Percent by mass of NaBr = (mass of NaBr / mass of solution) × 100

Mass of NaBr = 116 g

Mass of the solution = 216 g

Plugging in these values into the formula:

Percent by mass of NaBr = (116 g / 216 g) × 100

Using a calculator:

Percent by mass of NaBr = 53.7%

Therefore, the composition of the saturated aqueous solution of NaBr at 20°C is approximately 53.7% NaBr.