Question

В реакции меди с кислородом (О2) образовалось 800 г оксида меди (II). Рассчитать, какая масса меди вступила в реакцию с кислородом?Сu +O2 → CuO

Answer 1

  вот задачка попробуй сам потом решить...
  
  Ответ  ;  в  реакцию с кислородом вступило 640 г Меди  

Answer 2

Calculation of the Mass of Copper Reacted with Oxygen

To calculate the mass of copper that reacted with oxygen in the given reaction, we can use the stoichiometry of the balanced equation. The balanced equation for the reaction is:

Cu + O2 → CuO

According to the equation, 1 mole of copper (Cu) reacts with 1 mole of oxygen (O2) to form 1 mole of copper oxide (CuO).

To find the mass of copper that reacted with oxygen, we need to know the molar mass of copper (Cu) and the molar mass of oxygen (O2).

The molar mass of copper (Cu) is approximately 63.55 g/mol.

The molar mass of oxygen (O2) is approximately 32.00 g/mol.

Since the reaction is 1:1 between copper and oxygen, the molar mass of copper oxide (CuO) is the sum of the molar masses of copper and oxygen, which is approximately 63.55 g/mol + 32.00 g/mol = 95.55 g/mol.

Now, we can set up a proportion to find the mass of copper (Cu) that reacted with oxygen (O2):

Mass of Cu / Molar mass of Cu = Mass of CuO / Molar mass of CuO

Let's denote the mass of copper as 'x' grams.

Using the given information that 800 g of copper oxide (CuO) was formed, we can set up the proportion:

x g / 63.55 g/mol = 800 g / 95.55 g/mol

Simplifying the proportion:

x / 63.55 = 800 / 95.55

Cross-multiplying:

x * 95.55 = 800 * 63.55

Solving for 'x', the mass of copper:

x = (800 * 63.55) / 95.55 ≈ 531.07 g

Therefore, approximately 531.07 grams of copper reacted with oxygen in the given reaction.

Please note that the calculated mass is an approximation due to rounding off the molar masses of copper and oxygen.

I hope this helps! Let me know if you have any further questions.