An electric device delivers a current of 5 a to a device. how many electrons flow through this device in 5 s? (e = 1.60 * 10-19 c)

2*10^20 electrons Electron flow rate is given by I/e, where I is the current in amps and e is the electric charge constant, in coulombs. This will have units of electrons per second, so we must multiply by the time, t, in seconds. So the full equation is: N = (I*t) / e Plugging in: N = (5a * 5s) / (1.6*10^-19 c) N = 1.5625*10^20 electrons But since we only have 1 significant figure to work with, we state our final value as N = 2*10^20 electrons