Asked by Odesa

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091X10^-2 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 stranik
1.598e14.
Answered by help
an explanation please?
i need a formula!
Answered by babol
The answer is not right, at least for me. anyone who knows how to do it and could write how ?
Answered by qwerty
Please, I need the formula!
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 chelo
What is the formula to use
Answered by chelo
Please, I need the formula!
Answered by Anon
The data for everyone of us is different as you noticed formula is required
Answered by Anon
Go to back to H4P2
Answered by Odesa
As its Si: 5.00*10^22 / (gallium level*10^-2) by someguy
Answered by Odesa
1.5455*10^19
Answered by aaa
gallium level*10^-2) what is this?
Answered by qwerty
What is the formula, please?
Answered by School girl
What about 3.091*10^-7? please
Answered by anon2
H4P2
Answered by Anonymous
1.6265*10^14 i have the answer for 3.091*10^-7
here the caculation
atomic percent*NA(avogadro number)

the solution/atomic volume of gallium
Answered by Anonymous
1.5442*10^14
this is the corect ones
Answered by qwerty
step1
(6.023*10^23)/(12.05)=m

step 2
m*(level of atomic percent)*(10^-2)
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