Homework Help: chemistry

Posted by School girl on Friday, December 14, 2012 at 1:22pm.

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091*10^-7 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in this Si crystal?

chemistry - hina, Friday, December 14, 2012 at 11:52pm
(atomic percent/100*6.02*10^23)/ atomic volume of element
chemistry - School girl, Saturday, December 15, 2012 at 1:00am
Sorry hina but it didn't work
chemistry - MIT2, Saturday, December 15, 2012 at 5:27am
CHEAT!

Do NOT help this person. They are trying to cheat in a midterm exam.
chemistry - Odesa, Saturday, December 15, 2012 at 5:50am
(6.023*10^23)/(12.05)=m
m*(3.091*10^-7)*(10^-2)=

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