Question

ОООЧЕНЬ СРОЧНОО!! ЗА ПРАВИЛЬНОЕ РЕШЕНИЕ ДАМ БАЛЛЫ!!!Сколько грамм углерода содержащего 10 процентов примесей потребуется для получения 40 г меди при её восстановлении углем из окида меди?

Answer 1

Calculation of the Amount of Carbon Needed for Copper Reduction

To calculate the amount of carbon needed for the reduction of copper from copper oxide, we need to consider the stoichiometry of the reaction. The balanced chemical equation for the reduction of copper oxide with carbon is as follows:

2CuO + C → 2Cu + CO2

From the balanced equation, we can see that for every 2 moles of copper oxide (CuO), we need 1 mole of carbon (C) to produce 2 moles of copper (Cu).

Now, let's calculate the amount of carbon needed to produce 40 grams of copper (Cu).

1. Determine the molar mass of copper (Cu): - The molar mass of copper is approximately 63.55 grams/mol.

2. Convert the mass of copper to moles: - Moles of copper (Cu) = Mass of copper (g) / Molar mass of copper (g/mol) - Moles of copper (Cu) = 40 g / 63.55 g/mol ≈ 0.629 mol

3. Determine the moles of copper oxide (CuO) needed: - From the balanced equation, we know that 2 moles of copper oxide (CuO) are required to produce 2 moles of copper (Cu). - Therefore, the moles of copper oxide (CuO) needed = 0.629 mol

4. Determine the moles of carbon (C) needed: - From the balanced equation, we know that 1 mole of carbon (C) is required to produce 2 moles of copper (Cu). - Therefore, the moles of carbon (C) needed = 0.629 mol / 2 = 0.3145 mol

5. Calculate the mass of carbon needed: - Mass of carbon (C) = Moles of carbon (mol) × Molar mass of carbon (g/mol) - Mass of carbon (C) = 0.3145 mol × molar mass of carbon (g/mol)

Unfortunately, the specific molar mass of carbon is not provided in the search results. To proceed with the calculation, we need the molar mass of carbon. The molar mass of carbon is approximately 12.01 g/mol.

Using the molar mass of carbon, we can calculate the mass of carbon needed.

- Mass of carbon (C) = 0.3145 mol × 12.01 g/mol ≈ 3.777 g

Therefore, approximately 3.777 grams of carbon containing 10% impurities will be required to obtain 40 grams of copper through the reduction of copper oxide using carbon.

Please note that the molar mass of carbon is an approximate value and can vary depending on the isotopic composition of carbon.

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