Estimate charge on all the electrons in a 10g cu penny.
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The total number of electrons in an atom of Cu is 29
Given,
mass=10g
Molar mass= 63.5
Therefore,
no. of moles of Cu = 10/63.5 = 0.157
So,
total numbers of electron =0.157*6.023*1023*29 =N(let).
So,
the toal charge due to N electrons is
Qe = N*e { e is the fundamental charge =1.6*10-19}
= 0.157*6.023*1023*29*1.6*10-19
= 4.387*105 C
Given,
mass=10g
Molar mass= 63.5
Therefore,
no. of moles of Cu = 10/63.5 = 0.157
So,
total numbers of electron =0.157*6.023*1023*29 =N(let).
So,
the toal charge due to N electrons is
Qe = N*e { e is the fundamental charge =1.6*10-19}
= 0.157*6.023*1023*29*1.6*10-19
= 4.387*105 C
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