What is the activity of a 217 uCi sample of carbon14 in becq
     What is the activity of a 21.7 uCi sample of carbon-14 in becquerels? Number Bq  
  
  Solution
1 Ci = 3.7 x10^10 disintegrations/s
1 Bq= 1 disintegration/s
21.7 uCi = 21.7 x 10^-6 Ci
= 21.7 x 10^-6 x 3.7 x10^10
= 802900 disintegrations / s
activity = 8.03 x 10^5 Bq

