Yash Jain
Last Activity: 10 Years ago
See, the total charge over the neutral Copper penny would be zero. that is,
Qnet = Qe + Qp {where e and p are electrons and protons resp. ; Qep>0}
Individually, Qe and Qp can be calculated as follows:
The total number of electrons in an atom of Cu is 29
Given mass: 3.11 ; Molar mass: 63.5
Therefore, no. of moles of Cu = 3.11/63.5 = 0.049
So, total numbers of electron would be = 0.049*6.023*1023*29 = N(say)
Hence, the toal charge due to N electrons is
Qe = Ne {where e is the fundamental charge 1.6*10-19}
= 0.049*6.023*1023*29*1.6*10-19
= 1.37*105 C
