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chemistry

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The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction.
It has a half-life of 8.0 days.

I-131 -> Xe-131 + e

If you start with 1.40 g I-131, how many grams of I-131 will be left after the following days?

08 days: g,
16 days: g,
20 days: g,
24 days: g,
30 days: g
32 days: g
47 days: g

  • chemistry - ,

    k = 0.693/t1/2
    Then ln(No/N) = kt
    No = 1.41 g
    N = ?
    k = from above
    t = 8 days for #1.

    The others are done the same way. Solve for N.

  • chemistry - ,

    Hhf

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