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Math Help - 1st Year Chemisty Question on Density

  1. #1
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    1st Year Chemisty Question on Density

    A lump of pure copper weighs 25.021 in air and 22.127 when submerged in water ( = 0.9982 ) at 20.0 . Suppose the copper is then rolled into a 253- foil of uniform thickness. What will this thickness be, in millimeters?



    I figured out that the copper has a volume of 2.8992cm^3..

    Now I can't figure out the second part.. I have 2 inccorect answers so far of 1.15 and 3.41. Any help?
    Last edited by Slipery; September 19th 2009 at 05:49 PM.
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  2. #2
    Member elninio's Avatar
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    253cm^2 multiplied by xcm will give you 2.8992 cm^3

    2.8992/253= 0.0115cm = 0.115mm

    (If I am correct, please thank me )
    Last edited by elninio; September 28th 2009 at 02:28 PM.
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