Homework Help: ChemB

Posted by L.Bianchessi on Sunday, January 22, 2012 at 9:28pm.

measurements of carbon 14 taken from linen wrappings of the book of isaiah from the dead sea scrolls indicate that the scrolls contain 79.5% of the carbon 14 expected in living tissue. how old are these scrolls if the half life of carbon 14 is 5730 years? All radioactive decay is first order.

ChemB - DrBob222, Sunday, January 22, 2012 at 10:06pm
k = 0.693/t_1/2
Then
ln(No/N) = kt
No = 100
N = 79.5
k from above
solve for t in years.

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