Formula weight & electron mass

Subject: Formula weight & electron mass

Date: Tue Sep 21 14:37:01 1999
Posted by DJ Burlingame
Grade level: 10-12 School: Grosse Pointe North High
City: Grosse Pointe Woods State/Province: Michigan Country: USA
Area of science: Chemistry
ID: 937939021.Ch

Message:


When calculating the formula weight of a very large molecular formula 
(e.g. Hemalogbin
C2952 H4664 N812 O832 S8 Fe4), is the mass of the electrons included?  
Although the
electrons are only 1/1480 of an AMU, when you have a substance like this, 
the electrons
alone would count for over 40 g/mol.  Is the mass of the electrons 
factored in,or is it left
out when calculating molor masses like this?

Re: Formula weight & electron mass

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