Question

May I ask what is Faraday's constant and why do we use it here?

Example: Gold can be plated out of a solution containing Au3+ based on the following half reaction: Au3+ (aq) + 3 e -  ---->  Au (s) a) What mass of gold is plated by a 41 minute flow of 6.8 A current? Example: Gold can be plated out of a solution containing Au3+ based on the following half reaction: Au3+ (aq) + 3 e -  ---->  Au (s) a) What mass of gold is plated by a 41 minute flow of 6.8 A current?