2.5 g copper penny is given a charge of -2.6 nC. a) How many electrons were transferred in order to create the charge on the penny?  b) By what percentage do the transferred electrons change the mass of the penny? (Express your result as a positive percentage for an increase, negative for a decrease

Physics for Scientists and Engineers: Foundations and Connections
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Chapter23: Electric Forces
Section: Chapter Questions
Problem 6PQ: A sphere has a net charge of 8.05 nC, and a negatively charged rod has a charge of 6.03 nC. The...
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A 2.5 g copper penny is given a charge of -2.6 nC.

a) How many electrons were transferred in order to create the charge on the penny? 

b) By what percentage do the transferred electrons change the mass of the penny? (Express your result as a positive percentage for an increase, negative for a decrease.) 

Expert Solution
Step 1

Given 

Mass of copper penny = 2.5 g

Total charge given = -2.6 nC

We know charge on electron

= - 1.602 × 10-19C

Mass of electron = 9.109 × 10-28 g

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