Please helpme with my homework. How to solve thisproblem? Ch17 #4 (B) or (C) The

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Please helpme with my homework. How to solve thisproblem? Ch17 #4 (B) or (C) The isotope cobalt 60 gas a decay constantr=4.2x10-1s-1. Consider a puresample of 1g of 60Co. (A) How many atoms are in thissample? = 1x1016 ( Teacher gave us thisanswer.) (B) How many 60Co atoma will remain afterone year? =8.76x1015 ( Teacher gave us thisanswer.) (C)What is the half-life of60Co? = 5.23yers ( Teacher gave us thisanswer.) Please helpme with my homework. How to solve thisproblem? Ch17 #4 (B) or (C) The isotope cobalt 60 gas a decay constantr=4.2x10-1s-1. Consider a puresample of 1g of 60Co. (A) How many atoms are in thissample? = 1x1016 ( Teacher gave us thisanswer.) (B) How many 60Co atoma will remain afterone year? =8.76x1015 ( Teacher gave us thisanswer.) (C)What is the half-life of60Co? = 5.23yers ( Teacher gave us thisanswer.)

Explanation / Answer

Given  

          decayconstant    = 4.2 x 10-1s-1  

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