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Chrome File Edit View History Bookmarks People Window Help 47% D Wed Sep 2 9:50 PM a E Screen Shot x V Prob Set one- due sep x Sakai CHEM 210DL 00 x c Chegg C www.webassign.net/web/Student/Assignment-Responses/submit?dep 729989 O Duke Email MRI Duke Sakai Gateway Regions online Bank E ESPN: The worldwid P Pandora z Duke work w w. Norton eBook Netflix Duke Students Apps 7. C+ 4 points I Previous Answers ZumChemP6 20 E.024. My Notes Ask Your Tea A living plant contains approximately the same fraction of carbon-14 as in atmospheric carbon dioxide. The observed rate of decay of carbon-14 from a living plant is 15.3 counts per minute per gram of carbon. How many counts per minute per gram of carbon will be measured from a 17000 year old sample? (For C, t 5730 years 1/2 40 1.96e-4 x counts per minute per gram will radiocarbon dating work well for small samples of 10 mg or less? yes no counts per minute for 10. mg of carbon 402 counts/min Explain This answer has not been graded yet. Need Help? L Read It Watch It

Explanation / Answer

No = 15.3 count / min

N = ?

t1/2 = 5730 years

t = 17000 years

t = n t1/2

17000 = n x 5730

n = 2.966

N/No = 1/2n

N / 15.3 = 1/ 2^2.966

N= 1.958 count / min --------------------------> answer 1

per gram 1.958 count /min

1000mg --------------> 1.958 count /min

10 mg ---------------> 0.01958 count /min----------------------> answer 2

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