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A coulomb is a huge amount of charge. How many electrons are necessary to produce a -2.0 C charge? (recall the charge of an electron is e = -1.60 × 10-19 C)

 Jun 13, 2016
 #1
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These are the options possible for this problem:

 

A.6.0 × 1023 

B.1.25 × 1019 

C.6.3 × 109 

D.6.25 × 1018 

E.1.6 × 1019 

 Jun 13, 2016
 #2
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A coulomb is a huge amount of charge. How many electrons are necessary to produce a -2.0 C charge? (recall the charge of an electron is e = -1.60 × 10-19 C)

 

 Since the charge of an electron is e = -1.60 × 10-19 C), therefore 1 coulomb has:

1/[-1.60 x 10^-19] =6.25 x 10^18 electron x 2 =1.25 x 10^19 electrons needed to produce -2.0C charge.

 Jun 13, 2016

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