Answer: 3618 seconds
Step-by-step explanation:

According to mole concept:
1 mole of an atom contains
number of particles.
We know that:
Charge on 1 electron =
Charge on 1 mole of electrons =

At cathode:

1 mole of aluminium is deposited by =
Thus 0.15 moles of aluminium is deposited by =
To calculate the time required, we use the equation:
where,
I = current passed =12.0 A
q = total charge =
t = time required in seconds = ?
Putting values in above equation, we get:
Hence, the amount of time required to produce 4.00 g of aluminum metal from the electrolysis of molten
with an electrical current of 12.0 A is 3618 seconds