Answer:
The mass of copper generated is 19.07g
Explanation:
Let's write out the chemical equation;
3CuCl2 + 2Al → 2AlCl3 + 3Cu
3: 2: 2: 3
After confirming that the reaction is balanced, we can continue.
The problem asks for the mass of Cu produced from 5.4g of Al reacting.
Based on the equation, what is the relation between Al and Cu?
2 moles of Al would yield 3 moles of Cu
Expressing this in mass terms, we find;
mass = number of moles * molar mass
Mass of Aluminium = 2 * 26.98 = 53.98 g
Mass of Copper = 3 * 63.546 = 190.638g
This indicates that;
53.98 g of Al would react to create 190.638g of Cu
So, how much Cu would result from 5.4 g of Al?
This leads us to;
53.98 = 190.638
5.4 = x
By cross multiplication, we determine;
x = (190.638 * 5.4) / 53.98
x = 19.07 g
The mass of copper created is 19.07g