Answer:
122 seconds
Explanation:
Cu{2+} + 2 e{-} → Cu
the stoichiometric relationships between miles of the electron and the moles of
Cu is 2 mol e- : 1 mol Cu
you are given copper mass (145 mg) and current (3.6 A).
Remember that,
1A = 1C/s , 1g = 1000 mg and molar mass of Cu = 63.55 g/mol
145 mg = 0.145 g
= (0.145 g Cu) / (63.55 g Cu/mol) x (2 mol e{-} / 1 mol Cu) x (9.64853399 x 10^4 C/mol e{-}) / (3.6 A)
= 0.00228 x 2 x 26777.7
= 122 seconds
