Need chemistry help with many moles of electrons that are produced from a current

Anonymous
timer Asked: Dec 4th, 2015
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Question Description

How many moles of electrons are produced from a current of 15.6 A in 3.20 h?

Select one:

Tutor Answer

nick1982
School: New York University

Thank you for the opportunity to help you with your question!

1 Ampere is 1 Coulomb per sec 

Thus 15.6 for 3.20 hours = 11520 seconds wild yield 179712 coulomb

 1 Coulomb is 6.241×1018 times the elementary charge (the one electron charge) 

So the number of electrons will be 179712  * 6.241 * 10^18 = 11.21 10^4 * 10^18 = 11.21* 10^23 electrons

1 mol of electrons is equivalent to that many electrons as the avocado number meaning 

1 mol is 6.022×1023     electrons 

So the number of moles we will have will be : n = 11.21 * 10^23/ 6.022 10^ 23 = 1.86 mol

Correct answer is d. 1.86 mol

Please let me know if you need any clarification. I'm always happy to answer your questions.

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Anonymous
Good stuff. Would use again.

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