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?

1.598e14.

an explanation please?

i need a formula!

The answer is not right, at least for me. anyone who knows how to do it and could write how ?

Please, I need the formula!

The answer 1.598e14 was not right for me too. Any ideas what happen and how to write it out?

What is the formula to use

Please, I need the formula!

The data for everyone of us is different as you noticed formula is required

Go to back to H4P2

As its Si: 5.00*10^22 / (gallium level*10^-2) by someguy