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chemistry

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Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−6 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?
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  • chemistry -

    wrong answer...

  • chemistry -

    Any hint how to do it?

  • chemistry -

    CHEAT!

    Do NOT help this person. They are trying to cheat in a midterm exam.

  • chemistry -

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

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