This blew my mind

A copper penny has a mass of 2.60 g. Assuming pure copper, how much of this mass is contributed by

(a) the neutrons in the copper nuclei and (b)electrons?

Step-by-step solution:

• Step 1 of 5
  (a) The atomic weight of Cu = 63.55 g/mol
  
  One ‘Cu’ atom contains 29 protons and 29 electrons.
  
  63.55g or 1 mole of Cu contains
  
  Number of atoms in 2.60g of Cu =
  
  
  
  So, 2.60g of Cu contains
  
  and protons
  
  The mass of one electron
  
  So, mass of total electrons =
  
  
  

 

Log in or Sign up to hide this ad.

@Joe kool

The only problem with this is that there is no pure copper cent. At most, it is 95% copper.

Chris

 

And atleast 3% finger oils and dirt and dust and dead skin and some sticky beverage if found in a car cup holder

 

I said to myself when I first read it that seems like way too many electrons and protons.

 

"This blew my mind"
Short trip.

 

Some interesting humor Joe.

 

This will blow your mind for sure.

 

x

 

what coin are we talking about?

 

You don't see it?

 

i can't find it ,!

 

You discount the probability of lost electrons through oxidation of the coin's surface and as was pointed out copper cents are only 95% copper.

 

Boom!! I got it

 

What is the common street name for this compound?

 

bunk?