Answer:
Mass = 19.1 g
Explanation:
Given data:
Mass of CuO = 22.0 g
Mass of copper formed = ?
Solution:
Chemical equation:
CuO + H₂ → Cu + H₂O
Number of moles of CuO:
Number of moles = mass/ molar mass
Number of moles = 22.0 g/ 79.545 g/mol
Number of moles = 0.3 mol
Now we will compare the moles of CuO with Cu.
CuO : Cu
1 : 1
0.3 : 0.3
Mass of copper:
Mass = number of moles × molar mass
Mass = 0.3 mol × 63.546 g/mol
Mass = 19.1 g
