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Chemistry

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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?

  • Chemistry - ,

    1.598e14.

  • Chemistry - ,

    an explanation please?
    i need a formula!

  • Chemistry - ,

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

  • Chemistry - ,

    Please, I need the formula!

  • Chemistry - ,

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

  • Chemistry - ,

    What is the formula to use

  • Chemistry - ,

    Please, I need the formula!

  • Chemistry - ,

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

  • Chemistry - ,

    Go to back to H4P2

  • Chemistry - ,

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

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    1.5455*10^19

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    gallium level*10^-2) what is this?

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    What is the formula, please?

  • Chemistry - ,

    What about 3.091*10^-7? please

  • Chemistry - ,

    H4P2

  • Chemistry - ,

    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

  • Chemistry - ,

    1.5442*10^14
    this is the corect ones

  • Chemistry - ,

    step1
    (6.023*10^23)/(12.05)=m

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

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