The ratio for an mass-to-charge electron is #5.64 x 10^(-12)# kg/C. In another experiment, using Millikan's oil drop apparatus, the found the charge on the electron is #1.605 x 10^(-19)# C. What would be the mass of the electron, according to these data?
We have the ratio
And should I multiply
Well, I got the units of mass, which is good, however, you can refine the estimate.