Answer:
50.8g
Explanation:
Given parameters:
Nubmer of mole of Cu₂O = 0.4mol
Unknown:
Mass of Cu produced = ?
Solution:
The balanced reaction equation:
Cu₂O + H₂ ⇄ 2Cu + H₂O
From the reaction, we know that:
1 mole of Cu₂O produced 2 moles of Cu
0.4 mol of Cu₂O would give 0.8mol of Cu
Now we know the number of moles of Cu produced because the limiting reactant here is Cu₂O. It was used up in the reaction in which the hydrogen gas was in excess.
To find the mass of Cu produced, we use the equation below :
Mass of Cu = Number of moles of Cu x molar mass of Cu
Molar mass of Cu = 63.5gmol⁻¹
Mass of Cu = 0.8 x 63.5 = 50.8g
