Question

Вычислите массовую долю растворенного вещества в растворе , приготовленному из 15 г соли и 45г воды. Heeelp please)

Answer 1

Мас.доля= 15/60=0,25 или 25%

Answer 2

Calculating the Mass Fraction of the Solute in a Solution

To calculate the mass fraction of the solute in a solution, we can use the formula:

Mass Fraction = (Mass of Solute / Total Mass of Solution) x 100%

Given: - Mass of solute (salt) = 15 g - Mass of solvent (water) = 45 g

Using the given values, we can calculate the mass fraction of the solute in the solution.

Mass Fraction = (15 g / (15 g + 45 g)) x 100%

Mass Fraction = (15 g / 60 g) x 100%

Mass Fraction = 0.25 x 100%

Mass Fraction = 25%

Therefore, the mass fraction of the dissolved substance in the solution is 25%.