Physics question (AS) Watch
a) the total charge passed
b) the number of copper atoms deposited on the cathode
c) the mass deposited on the cathode given each copper atom has a mass of 1.1 x 10^-25kg
Answers given in book
b)1.5 x 19^21
b) Cu(+2) -2e -> Cu
If n is number of Cu(+2)-> Cu, so Q = n*2e
-> n = Q/2e =480/2*1.6E-19 = 1.5E21
c) m = n*1.1E-25 = 1.65E-4kg= 0.165g.
Is it right?