HELP! Chemistry Question!!! (1 Viewer)

Oobadoo

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I am doing an assignment on copper and aluminium, its really quite easy. However, I need to know what the crustal percentage of copper is, or the crustal abundance if you like. Most sources say 60 parts per million roughly, which is 0.00006 % (NASA says 0.00007). BUT virtually every othersource is simultaneously saying that the percentage of copper by weight is 0.0058 %!!!!! Does anyone know which one to go with???

(If the answer is terribly obvious I must have had a mental colapse and I apologise) :D
 

nat_doc

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go with Nasa. it really doesn't matter... as long as you acknowledge it in ur biblio, then ur correct
 

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