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 90% of the lead to decay? Do not put a unit in your answer. Do not round off the value of "k". Round off your final answer to the nearest whole number.
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 90% of the lead to decay? Do not put a unit in your answer. Do not round off the value of "k". Round off your final answer to the nearest whole number.
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter14: Chemical Kinetics: The Rates Of Chemical Reactions
Section: Chapter Questions
Problem 29PS: The radioactive isotope 64Cu is used in the form of copper(II) acetate to study Wilsons disease. The...
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Transcribed Image Text: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 90% of the lead to decay?
Do not put a unit in your answer.
Do not round off the value of "k".
Round off your final answer to the nearest whole number.
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