Asked by student

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 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 Odesa
The answer 1.598e14 was not right for me too. Any ideas what happen and how to write it out?
Answered by someguy
As its Si: 5.00*10^22 / (gallium level*10^-2)
Answered by Odesa
Thank you someguy
Answered by aaa
how can you do this one?
Answered by qwerty
What is the formula?, please
Answered by student
but answer is not right its not 5.00*10^22
Answered by Anonymous
guys check ur index value of the gallium levels they are different
Answered by MIT2
CHEAT!

These are midterm exam problems. They shouldn't be posted here. Anyone who does Deserves yo be kicked off the course.
Answered by Odesa
(6.023*10^23)/(12.05)=m
m*(3.091*10^-8)*(10^-2)=
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