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Thallium -208 has a half-life of 3.053 min. How long will it take for 120g t decat ot 7.50g

  • chemistry -

    k = 0.693/t1/2
    Substitute k into the equation below:
    ln(No/N) = kt.
    No = initial = 120g
    N = final = 7.50g
    k from above.
    Solve for t.

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