Question

Очень надоо!!! В 200 г 10%-го раствора сахара добавили 25 г сахара. Найдите массовую долю вещества в полученном растворе.

Answer 1

Ответ:

200*10/100=20

m(cax)=20+25=45

m(pac)=200+25=225

w%=45*100/225=20%

Answer 2

Calculation of Mass Fraction in the Solution

To find the mass fraction of the substance in the solution, we need to calculate the total mass of the solution and the mass of the substance.

Given: - Initial solution: 200 g of 10% sugar solution - Additional sugar added: 25 g

To calculate the total mass of the solution, we add the initial mass of the solution to the mass of the additional sugar: Total mass of the solution = Initial mass of the solution + Mass of additional sugar

Total mass of the solution = 200 g + 25 g = 225 g

To calculate the mass of the substance (sugar) in the solution, we add the initial mass of the substance to the mass of the additional sugar: Mass of the substance = Initial mass of the substance + Mass of additional sugar

Mass of the substance = (10/100) * Initial mass of the solution + 25 g

Now, we can calculate the mass fraction of the substance in the solution: Mass fraction = (Mass of the substance / Total mass of the solution) * 100

Let's calculate the mass fraction using the given values:

Initial mass of the solution = 200 g Initial mass of the substance = (10/100) * Initial mass of the solution = (10/100) * 200 g = 20 g

Mass of the substance = 20 g + 25 g = 45 g

Mass fraction = (45 g / 225 g) * 100 = 20%

Therefore, the mass fraction of the substance in the obtained solution is 20%.

Please note that the search results provided by You.com did not directly answer the question. Therefore, the calculation was done based on the given information and mathematical principles.