Chemistry, 24.07.2019 22:30 adejumoayobami1
The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 75% of the lead to decay? (round your answer to two decimal places.)
Answers: 1
![time=\frac{1}{k}(ln[\frac{A_{0}}{A_{t}}]](/tpl/images/0128/8405/a5dc9.png)
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The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time...
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