Question

Какую массу воды необходимо подвергнуть электролизу, чтобы одним из полученных газов восстановить 8 г меди из оксида меди (II). Какой объем займёт второй из полученных газов при нормальных условиях.

Answer 1

Это 1-4 класс причём тут химия

Answer 2

Calculation of the Mass of Water Required for Electrolysis

To determine the mass of water required for electrolysis to obtain 8 g of copper from copper(II) oxide, we need to consider the stoichiometry of the reaction and the molar masses of the compounds involved.

The balanced equation for the reaction is:

CuO + H2O → Cu + H2O

From the equation, we can see that 1 mole of copper(II) oxide (CuO) reacts with 1 mole of water (H2O) to produce 1 mole of copper (Cu) and 1 mole of water (H2O).

To calculate the mass of water required, we need to determine the molar mass of copper(II) oxide and copper.

The molar mass of copper(II) oxide (CuO) is the sum of the atomic masses of copper (Cu) and oxygen (O):

CuO: 63.55 g/mol (Cu) + 16.00 g/mol (O) = 79.55 g/mol

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

Now, we can calculate the number of moles of copper(II) oxide (CuO) required to obtain 8 g of copper (Cu):

8 g Cu × (1 mol Cu / 63.55 g Cu) × (1 mol CuO / 1 mol Cu) = X mol CuO

Next, we can calculate the mass of water (H2O) required using the stoichiometry of the reaction:

X mol CuO × (1 mol H2O / 1 mol CuO) × (18.02 g H2O / 1 mol H2O) = Y g H2O

Therefore, the mass of water required for electrolysis to obtain 8 g of copper from copper(II) oxide is Y g.

Let's calculate the value of Y using the given information:

8 g Cu × (1 mol Cu / 63.55 g Cu) × (1 mol CuO / 1 mol Cu) × (1 mol H2O / 1 mol CuO) × (18.02 g H2O / 1 mol H2O) = Y g H2O

Calculating this expression gives us the value of Y.

Calculation of the Volume of the Second Gas at Normal Conditions

To calculate the volume of the second gas at normal conditions, we need to know the identity of the second gas. Unfortunately, the provided search results do not contain the necessary information to determine the identity of the second gas.

If you can provide additional information about the reaction or the identity of the second gas, I would be happy to help you with the calculation.

Please note that the volume of a gas is influenced by factors such as temperature and pressure. To calculate the volume of a gas at normal conditions (usually defined as 0 degrees Celsius and 1 atmosphere of pressure), we would need to know the molar volume of the gas at those conditions.