Question

Определите массу углерода, необходимого для полного восстановления 56 г оксида меди (II) до металла. Принять, что в реакции образуется угарный газ. Ответ укажите в граммах и округлите до десятых.

Answer 1

Ответ:

масса углерода , необходимого для полного восстановления 56 г оксида меди (II) до металла= 8,4 г

Answer 2

Calculation of the Mass of Carbon Required for the Reduction of Copper(II) Oxide

To determine the mass of carbon required for the complete reduction of 56 g of copper(II) oxide (CuO) to metal, we need to consider the balanced chemical equation for the reaction. The balanced equation for the reduction of copper(II) oxide with carbon is as follows:

CuO + C → Cu + CO

From the balanced equation, we can see that 1 mole of copper(II) oxide reacts with 1 mole of carbon to produce 1 mole of copper and 1 mole of carbon monoxide.

To calculate the mass of carbon required, we need to convert the given mass of copper(II) oxide to moles using the molar mass of CuO. The molar mass of CuO is the sum of the atomic masses of copper (Cu) and oxygen (O):

Molar mass of CuO = atomic mass of Cu + atomic mass of O

Using the atomic masses from the periodic table, we find:

Molar mass of CuO = (63.55 g/mol) + (16.00 g/mol) = 79.55 g/mol

Now, we can calculate the number of moles of CuO:

Number of moles of CuO = mass of CuO / molar mass of CuO

Number of moles of CuO = 56 g / 79.55 g/mol

Calculating this, we find that the number of moles of CuO is approximately 0.704 moles.

Since the balanced equation shows that 1 mole of CuO reacts with 1 mole of carbon, we can conclude that 0.704 moles of carbon are required for the reaction.

To convert moles of carbon to grams, we need to multiply the number of moles by the molar mass of carbon. The molar mass of carbon is approximately 12.01 g/mol.

Mass of carbon required = number of moles of carbon × molar mass of carbon

Mass of carbon required = 0.704 moles × 12.01 g/mol

Calculating this, we find that the mass of carbon required is approximately 8.49 grams.

Therefore, the mass of carbon required for the complete reduction of 56 g of copper(II) oxide to metal is approximately 8.5 grams.