Chemistry, 06.12.2019 23:31 melkumathurin
Iron-59 is a beta emitter with a half-life of 44.5 days. if a sample initially contains 180 mg of iron-59, how much iron-59 is left in the sample after 267 days?
Answers: 3
![[A_t]=[A_0]e^{-kt}](/tpl/images/0407/1064/1ef89.png)
![[A_t]](/tpl/images/0407/1064/5262c.png)
is the concentration at time t
![[A_0]](/tpl/images/0407/1064/9a686.png)
is the initial concentration = 180 mg![[A_t]=180\ mg\times e^{-0.0156\times 267}](/tpl/images/0407/1064/2d970.png)
![[A_t]=180\times e^{-0.0156\times 267}\ mg](/tpl/images/0407/1064/63a27.png)
![[A_t]=2.79\ mg](/tpl/images/0407/1064/bf152.png)
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Iron-59 is a beta emitter with a half-life of 44.5 days. if a sample initially contains 180 mg of ir...
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