Question

An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 468 g (HINT: Assume all the carbon is 12C and determine the number of atoms) and careful measurements show that the remaining 14C has a current decay rate of 12 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was 1.3×10-12 & the half-life of 14C is 5730 y. age of bone =?

Please show me how to do this, thank you

Answer #1

An archaeologist finds some ancient jewelry made from
bone. The jewelry has a carbon mass of 383 g (HINT: Assume all the
carbon is 12C and determine the number of atoms) and
careful measurements show that the remaining 14C has a
current decay rate of 28 decays/s. Determine the age of the bone
(and presumably the jewelry). Remember, the ratio of 14C
to 12C when the animal died was 1.3×10-12
& the half-life of 14C is 5730 y.
age of...

The found jewelry has a carbon mass of 223 g (HINT:
Assume all the carbon is 12C and determine the number of
atoms) and careful measurements show that the remaining
14C has a current decay rate of 18 decays/s. Determine
the age of the bone (and presumably the jewelry). Remember, the
ratio of 14C to 12C when the animal died was
1.3×10-12 & the half-life of 14C is 5730
y.
I have tried this problem multiple times and have gotten...

An ancient wooden club is found that contains 77 g of carbon and
has an activity of 7.0 decays per second.
Determine its age assuming that in living trees the ratio of
14C/12C atoms is about 1.3×10^-12

An ancient wooden club is found that contains 78 gg of carbon
and has an activity of 8.8 decays per second. Determine its age
assuming that in living trees the ratio of 14C/12C14C/12C atoms is
about 1.3×10−121.3×10−12.

Carbon Dating: All living organisms contain two isotopes (types)
of carbon; carbon-12 ( 12C) and carbon-14 (14C). Carbon-12 is
stable, meaning that its atoms do not decay. Carbon-14 however, is
radioactive or unstable, meaning that an atom of carbon-14 may
decay. It does this by throwing off an electron and thus
transforming itself into Nitrogen 14. The ratio of carbon-14 to
carbon-12 is the same for all living organisims, about 1/10, 000.
However, once an organisim dies the carbon-14 begins...

An ancient club is found that contains 100 g of pure carbon and
has an activity of 6 decays per second. Determine its age assuming
that in living trees the ratio of 14C/12C
atoms is about 1.10 × 10-12. Note that
the half life of carbon-14 is 5700 years and the Avogadro number is
6.02 × 1023.

An ancient club is found that contains 100 g of pure carbon and
has an activity of 6.5 decays per second. Determine its age
assuming that in living trees the ratio of (14C/12C) atoms is about
1.30×10^-12. Note that the half life of carbon-14 is 5700 years and
the Avogadro number is 6.02×10^23.
Ans in Years

An ancient club is found that contains 180 g of pure carbon and
has an activity of 7.5 decays per second. Determine its age
assuming that in living trees the ratio of (14C12C)(14C12C) atoms
is about 1.30 × 10-12. Note that the
half life of carbon-14 is 5700 years and the Avogadro number is
6.02 × 1023.
____years

Carbon-14 (14 6C) dating is a method for finding the age of an
organic artifact from the quantity of 14 6C it contains. Carbon-14,
an unstable isotope of carbon, follows a well-known sequence of
decay processes. The decay constants of these processes have been
well established, allowing researchers to determine the age of an
artifact knowing both the original amount of 14 6C and the current
amount.
In the lab, it is relatively easy to measure the activity of a...

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