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Posted by on Thursday, October 14, 2010 at 4:06pm.

half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 grams?

  • Chemistry - , Thursday, October 14, 2010 at 4:32pm

    First determine k.
    k = 0.593/t1/2, then substitute the value of k into the equation below.

    ln(256/N) = k(100)
    Solve for N in grams.

  • Chemistry - , Thursday, October 14, 2010 at 4:40pm

    Thanks so much!

  • corr'n--typos--Chemistry - , Thursday, October 14, 2010 at 4:56pm

    I made two typos. k = 0.693/t1/2

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