Asked by School girl

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?
Answered by hina
(atomic percent/100*6.02*10^23)/ atomic volume of element
Answered by School girl
Sorry hina but it didn't work
Answered by MIT2
CHEAT!

Do NOT help this person. They are trying to cheat in a midterm exam.
Answered by Odesa
(6.023*10^23)/(12.05)=m
m*(3.091*10^-7)*(10^-2)=
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