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[" 3.A freshly prepared sample of a cert...

[" 3.A freshly prepared sample of a certain radioactive isotope has an activity of "10mCi" .After "4.],[" its activity is "8.00mCi" ."],[" (a) Find the decay constant and half life "],[" (b) How many atoms of the isotope were contained in the freshly prepared sample? "],[" (c) What is the sample's activity "30.0h" after it is prepared? "]

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