How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu = | TigerDroppings.com

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LSUIEGRAD13
Member since Jan 2011
3939 posts

How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


Have all my HW correct but this one. Not asking for an answer but can someone walk me through it.






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SprintFun
USA Fan
Columbus, OH
Member since Dec 2007
40488 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


6





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theunknownknight
LSU Fan
Baton Rouge
Member since Sep 2005
27021 posts
 Online 

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


you gotta count them





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Spirit of Dunson
Columbia Fan
Member since Mar 2007
21578 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


for real?
convert grams to moles. moles to molecules.
Please tell me this isn't college.






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LSUGradATL
UNO Fan
Warsawa/ATL
Member since Jul 2007
10497 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


(1 amu = 1.6605 10-24 g)





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Dumplin
LSU Fan
New Orleans, LA
Member since Sep 2008
1343 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


Use the molecular weight of copper to determine how many moles constitutes 2.15g. There will be Avagadro's number of atoms in a mole of copper.





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Spirit of Dunson
Columbia Fan
Member since Mar 2007
21578 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


count them in this thread.
LINK






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LSUIEGRAD13
Member since Jan 2011
3939 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


This would be chem 1201. Hate it. Thanks for the help.





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Rouge
USA Fan
deep in dem backchannels
Member since Oct 2004
96137 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


1 gram = 6.0221415E23 atomic mass units

Atomic Mass of copper: 63.546 amu


(6.0221415E23 * 2.15) / 63.546






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Gaston
LSU Fan
Dirty Coast
Member since Aug 2008
19951 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


Industrial Engineering, and a sophomore?





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littlePNdaB
LSU Fan
Baton Rouge
Member since May 2010
670 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


2.15g x 1mol/53.546g x 6.022x10^23/1mol = 2.42x10^22 molecules of Cu





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Gaston
LSU Fan
Dirty Coast
Member since Aug 2008
19951 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

This would be chem 1201. Hate it.


You ever thought of a marketing major?






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WhiteWhale
LSU Fan
LSU Fan, Auburn Hater
Member since Aug 2009
6546 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

LSUIEGRAD13



The frick?

How cant you do this? You asked a different easy question recently.






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Tbobby
USA Fan
Member since Dec 2006
3473 posts
 Online 

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


There are 6.02 x 10 X 23 moles in a avacado.





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Spirit of Dunson
Columbia Fan
Member since Mar 2007
21578 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

2.15g x 1mol/53.546g
where did you get this number?






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Rouge
USA Fan
deep in dem backchannels
Member since Oct 2004
96137 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

53.546g


where did you get this number?
typo

typed 5 instead of 6

honest mistake, i'm sure






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LSUIEGRAD13
Member since Jan 2011
3939 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


This is the first question I have asked. For all non chem engineers you only have to take 2 chems.





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Rouge
USA Fan
deep in dem backchannels
Member since Oct 2004
96137 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

LSUIEGRAD13
go into indoor air quality

decent money to be made

thank me later

work towards being Certified Industrial Hygienist






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Spirit of Dunson
Columbia Fan
Member since Mar 2007
21578 posts

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

typo

typed 5 instead of 6

honest mistake, i'm sure
i just wanted to give him shite. I was about to make a manganese isotope joke.



This post was edited on 1/27 at 4:01 pm


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Tbobby
USA Fan
Member since Dec 2006
3473 posts
 Online 

re: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu =


quote:

Certified Industrial Hygienist


Telling men they have to shave their goatees.






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