A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?

Answer 1

each Cr ion needs two electrons.

Number of electrons: Current*time/chargeonElectron

4.6*1.1*60SECONDS/e

put the charge on an electron e in, and compute.
Then
massCr=molesCr*molmassCr
where molesCr=numberElectrons/2*1/avagnumber