Homework Help: Chemistry

Posted by T on Saturday, December 15, 2012 at 2:47am.

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−4 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 - T, Saturday, December 15, 2012 at 3:13am
Got the answer thanks anyway
Chemistry - Yamy, Saturday, December 15, 2012 at 3:55am
How did you get the answer? or what is your answer?
Chemistry - Anonymous, Saturday, December 15, 2012 at 4:50am
what is value for silicon in gallium
Chemistry - Paul, Saturday, December 15, 2012 at 5:18am
Don't give an answer. Just explain step by step by inserting the data above into the formula. So we can understand how to answer.
Chemistry - Antonio, Saturday, December 15, 2012 at 6:23am
This is a question from the second midterm of 3.091x by edx. Stop cheating, it's silly and pointless.
Chemistry - Anonymous, Sunday, December 16, 2012 at 12:32pm
"!#$&

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