The half life of cobalt 60 is 5.26 years after 10.52 years 5 grams of a 20 gram sample will remain

Question

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Answer 1

You did not state a question.  But whatever it is, find the answer by working with the formula

 

m(t) = m_o (1/2)^t/5.26,

 

where

 

m₀ = initial mass

t = number of years from when the mass was m₀

m(t) = remaining mass after t years