Here we're going to say when the initial mass for half reaction is given, we can utilize the mass version of the stoichiometric chart to find time. So here we're going to say this version is used when the given amount is in units of mass.

Here we're going to start out with grams of given and with these grams are given. We know how to go from grams to moles. We use the atomic mass of the oven. Now we're going from moles of Gibbon to moles of electrons. Given this requires us to do a jump when we do this jump, in actuality what we're doing is a mole of your element to moles of electrons transferred. So it's a mole to electrons comparison.

Here we'd have to use the coefficients in the balance equation. Now once we know the moles of electrons, we can utilize Faraday's constant and this will help us find the charge of our unknown. And once you know the charge of your unknown, you can use current which will then help you find seconds of unknown. So this is the chart we utilize when given our mass initially.