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Need help with conversion question.

  1. Aug 26, 2011 #1
    First off, I am glad to be a newbie to the forum. I am a freshman at Colorado State University who is undeclared with a mechanical engineering concentration. In my Chemistry 111 class, I have been practing a practice test online, but the last problem I can't get right. Can anybody show me how to do it? Don't worry about cheating or anything, it is only a practice test and not worth any points.

    A silicon atom-diameter 2.7X10 to the negative 10 meters, and a mass of 4.7X10 to the negetive 23rd grams. they are packed into a cube. What is the length of the cube formed by 1000kg of silicon atoms, packed this way?

    the answer is 0.75 meters, but I can't get there, is the problem.
  2. jcsd
  3. Aug 26, 2011 #2


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    welcome to pf!

    hi camrysedan92! welcome to pf! :smile:

    (try using the X2 icon just above the Reply box :wink:)
    show us what you've tried, and where you're stuck, and then we'll know how to help! :wink:
  4. Aug 26, 2011 #3


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    Hint: try figuring out how many silicon atoms are in 1000 kg of silicon.
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