When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 22.8 g copper(II) oxide is used?
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To determine the mass of copper that can be obtained when 22.8 g of copper(II) oxide is used, we need to know the balanced chemical equation for the reaction and calculate the molar masses involved. Here is the balanced equation:
CuO + H2 -> Cu + H2O
Now, let's calculate the molar masses:
- Molar mass of CuO: 63.55 g/mol (for copper) + 16.00 g/mol (for oxygen) = 79.55 g/mol
- Molar mass of Cu: 63.55 g/mol
- Molar mass of H2O: 1.01 g/mol (for hydrogen) + 16.00 g/mol (for oxygen) = 18.01 g/mol
Next, we can calculate the moles of copper(II) oxide:
moles of CuO = mass / molar mass = 22.8 g / 79.55 g/mol ≈ 0.287 mol
From the balanced equation, we see that the mole ratio between CuO and Cu is 1:1. Therefore, the moles of copper that can be obtained will also be 0.287 mol.
Finally, we can calculate the mass of copper:
mass of Cu = moles of Cu * molar mass of Cu = 0.287 mol * 63.55 g/mol ≈ 18.24 g
Therefore, approximately 18.24 g of copper can be obtained from the reaction.
To find the mass of copper that can be obtained from 22.8 g of copper(II) oxide, we need to consider the balanced chemical equation for the reaction.
The balanced equation for the reaction is:
CuO + H2 -> Cu + H2O
From the equation, we can see that 1 mole of copper(II) oxide (CuO) reacts with 1 mole of hydrogen gas (H2) to produce 1 mole of copper (Cu) and 1 mole of water (H2O).
The molar mass of CuO is 79.55 g/mol.
To find the moles of CuO in 22.8 g, we can use the formula:
moles = mass/molar mass
moles = 22.8 g / 79.55 g/mol = 0.287 mol
From the balanced equation, we know that the mole ratio between CuO and Cu is 1:1.
Therefore, the moles of copper (Cu) produced will also be 0.287 mol.
The molar mass of copper (Cu) is 63.55 g/mol.
To find the mass of copper (Cu), we can use the formula:
mass = moles x molar mass
mass = 0.287 mol x 63.55 g/mol = 18.27 g
Therefore, the mass of copper that can be obtained from 22.8 g of copper(II) oxide is 18.27 g.