1. The problem statement, all variables and given/known data The electron drift speed in a 1.00 -mm-diameter gold wire is 5.50*10^-5 m/s How long does it take 1 mole of electrons to flow through a cross section of the wire in a day? 2. Relevant equations i=n*A*v_d N_e=i*delta(t) 3. The attempt at a solution First I figured out the electron current. i=((5.9*10^28)*(.0005^2*pi)*(5.50*10^-5) i=2.55*10^18 e-/sec Since electron current is the amount of electrons per second I multiplied by 86,400s in a day: N_e=(2.55*10^18)*(86400) N_e=2.20*10^23 This gives me the number of electrons that pass through a cross sectional area. Since they are asking for 1 mole I divided by 6.02*10^23 (2.20*10^23)/(6.02*10^23) =.366 days This answer is wrong. I don't know what I'm doing wrong. Any help?