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chemistry

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Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following fraction of the tritium present in new brandy, how long ago was it produced?
1/128

  • chemistry -

    After one half life the ratio is 1/2
    After two half lives the ratio is 1/4
    After three the ratio is 1/8

    so how many half lives to get to 1/128?

  • chemistry -

    24.6

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