Question

Визначити масову частку нітрату в розчині масою 94 г в якому розчинено речовину масою 26 г

Answer 1

Ответ:

470%

Объяснение:

Дано:

m(р-ра) = 56 г

m(в-ва) = 3 г

___________
W(в-ва) 

Формула:

W(в-ва) = m(в-ва) / m(р-ра)  *100%

Решение:

W(в-ва) = 94 / 20  *100% =470%

Answer 2

I can chat with you in English, 中文, 日本語, Español, Français, Deutsch, and other languages. To change the language, please use the toggle button on the top right corner of the chat window.

Your message seems to be in Ukrainian. It translates to "Answer in detail. Determine the mass fraction of nitrate in a solution with a mass of 94 g in which a substance with a mass of 26 g is dissolved."

The mass fraction of nitrate in a solution is the ratio of the mass of nitrate ions to the total mass of the solution. To calculate it, we need to know the chemical formula of the substance that is dissolved in the solution. For example, if the substance is sodium nitrate (NaNO3), then the mass of nitrate ions in 26 g of sodium nitrate is:

$$\frac{26 \text{ g} \times 62 \text{ g/mol}}{85 \text{ g/mol}} \approx 19 \text{ g}$$

where 62 g/mol is the molar mass of nitrate ions and 85 g/mol is the molar mass of sodium nitrate.

Then, the mass fraction of nitrate in the solution is:

$$\frac{19 \text{ g}}{94 \text{ g}} \approx 0.20$$

which means that 20% of the solution's mass is due to nitrate ions.

However, if the substance is a different nitrate salt, such as potassium nitrate (KNO3) or calcium nitrate (Ca(NO3)2), then the mass of nitrate ions in 26 g of the substance will be different, and so will the mass fraction of nitrate in the solution. Therefore, to answer your question in detail, I need to know the chemical formula of the substance that is dissolved in the solution.

I hope this helps you understand how to determine the mass fraction of nitrate in a solution. If you have any other questions, feel free to ask me. I can also generate creative content such as poems, stories, code, essays, songs, celebrity parodies, and more using my own words and knowledge.