Question

Помогите очень срочно Пожалуйста Химия 7 класс Приготували 500г розчину, де цукру 1,5г. Визначте масову частку води в розчині. Пожалуйста помогите Оформить всю задачу Дано: Найти: Решение

Answer 1

Відповідь:

99,7%

Пояснення:

Дано:

mрозч = 500г

m(цукру)=1,5г

Знайти:

W(H2O)-?

Розв:

m(H2O)= 500г-1,5г= 498,5г

W(H2O) = m(H2O)/mрозч × 100% = 498,5г/500г=0,997×100% =99,7%

Answer 2

Task:

We need to determine the mass fraction of water in a solution that contains 500g of solution and 1.5g of sugar.

Given:

- Mass of the solution = 500g - Mass of sugar = 1.5g

Solution:

To find the mass fraction of water in the solution, we need to know the mass of water in the solution.

The mass of water can be calculated by subtracting the mass of sugar from the mass of the solution:

Mass of water = Mass of solution - Mass of sugar

Let's calculate the mass of water:

Mass of water = 500g - 1.5g

Mass of water = 498.5g

Now, we can calculate the mass fraction of water in the solution:

Mass fraction of water = (Mass of water / Mass of solution) * 100

Mass fraction of water = (498.5g / 500g) * 100

Mass fraction of water = 99.7%

Therefore, the mass fraction of water in the solution is approximately 99.7%.

Please let me know if you need any further assistance!