Question

В один сосуд вылили 200 г 5%ного раствора некоторого вещества,250г 10%ного этого же вещества,затем добавили 80г этого вещества и 120г воды. Вычислите массовую долю данного вещества в образовавшем растворе.

Answer 1

,,,,,,,,,,,,,,,,,,,,,,,,,

Answer 2

Calculation of Mass Fraction in the Solution

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

Given: - 200 g of a 5% solution of the substance - 250 g of a 10% solution of the same substance - 80 g of the substance - 120 g of water

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

1. Calculate the mass of the substance in the 5% solution: - Mass of the substance = 5% of 200 g = 0.05 * 200 g = 10 g

2. Calculate the mass of the substance in the 10% solution: - Mass of the substance = 10% of 250 g = 0.1 * 250 g = 25 g

3. Calculate the total mass of the substance in the solution: - Total mass of the substance = mass in the 5% solution + mass in the 10% solution + additional mass = 10 g + 25 g + 80 g = 115 g

4. Calculate the total mass of the solution: - Total mass of the solution = mass of the substance + mass of water = 115 g + 120 g = 235 g

5. Calculate the mass fraction of the substance in the solution: - Mass fraction = (mass of the substance / total mass of the solution) * 100% - Mass fraction = (115 g / 235 g) * 100% ≈ 48.94%

Therefore, the mass fraction of the substance in the resulting solution is approximately 48.94%.