Please helpme with my homework. How to solve thisproblem? Ch17 #1 The decay cons

Question

Please helpme with my homework. How to solve thisproblem? Ch17 #1 The decay constant of 210Rn is r = 0.29hour-1. If a sample pf 210Rn contains1012 atoms at t= 0 ,how many will remain: A)after 1hour and B) after 2 days? Answer A) is 7.48x1011 B) is9.01x105 Please helpme with my homework. How to solve thisproblem? Ch17 #1 The decay constant of 210Rn is r = 0.29hour-1. If a sample pf 210Rn contains1012 atoms at t= 0 ,how many will remain: A)after 1hour and B) after 2 days? Answer A) is 7.48x1011 B) is9.01x105

Explanation / Answer

r = 0.29 hour-1. N0 =1012 N = N0e-rt A) t = 1 hour, N = 1012e-(0.29*1) =7.48x1011 B) t = 2 days = 48 hours, N =1012e-(0.29*48) = 9.01x105

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