Question

В 120 г раствора содержится 15 г соли.Определить массовую долю вещества.

Answer 1

Массовая частка: 15:120=0.125

Answer 2

Calculating the Mass Fraction of a Substance in a Solution

To determine the mass fraction of a substance in a solution, we can use the formula:

Mass Fraction (w%) = (mass of substance / total mass of solution) * 100

Given that in a 120g solution there is 15g of salt, we can calculate the mass fraction as follows:

Mass Fraction (w%) = (15g / 120g) * 100

Mass Fraction (w%) = (0.125) * 100

Mass Fraction (w%) = 12.5%

So, the mass fraction of the salt in the solution is 12.5%.