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Please help me on my hw problem. i need to submit it by 11pm 04/19/09 (tomorrow)

  1. Apr 18, 2009 #1
    hi everyone, i have this hw problem that i'm trying to solve. please help me with this cux im not good at chem and i'm really stucked and i need to submit this problem online tomorrow ( 04/19/09 by 11pm .thanks a bunch for your help.


    How many atoms are present in a 65.0cm^3 sample of plumber's solder, a lead–tin alloy containing 67% Pb by mass and having a density of 9.4 g/cm^3?
     
  2. jcsd
  3. Apr 19, 2009 #2

    CompuChip

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    Welcome to PF.

    I don't know in which time zone you are (it's now 10:20 am here) but that's not a lot of time you have left.

    You could start by calculating how many grams of lead and how many grams of tin you have.
     
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