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PS2.7 The half-life for the (first-order) radioactive decay of 14C is 5730 years. An archaeological sample...
14C is a radioactive isotope with a half life of 5.73x10^3 years. Radioactive decay is first...
14C is a radioactive isotope with a half life of 5.73x10^3 years. Radioactive decay is first order process and the amount of 14C present in an object can be used to determine its age. How long does it take for for 90 % of the 14C in a sample to decompose?
1. The nucleus 14C (half life 5730 y) is used in radiocarbon dating to determine the...
1. The nucleus 14C (half life 5730 y) is used in radiocarbon dating to determine the age of previously living material. (a)A certain sample of wood currently shows a decay rate of 35.0 decays/s of 14C The wood is taken from a structure that was built from a tree that was cut 7,000 years ago. What would have been the 14C decay rate of this wood sample when the tree was cut? (b) Find the total binding energy (in MeV)...
The half-life of 14C is 5730 years. A sample contains 92.1 % of the 14C that...
The half-life of 14C is 5730 years. A sample contains 92.1 % of the 14C that it would contain if it were still part of a living being. What is the age (in years) of this sample?
Chem 142, Dr. Haefner 3 s. The radioactive decay of l4C is frst order, and the...
Chem 142, Dr. Haefner 3 s. The radioactive decay of l4C is frst order, and the half-life is 5800 years While a plant or anim ng, it has a constant proportion of 14C (relative to 12C) in its composition. When the organism dies, the proportion of 14C decreases as a result of radioactive decay, and the age of the organism can be determined if the proportion of carbon-14 in its remains is measured. If the proportion of 14C in an...
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with...
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with its surrounding so that a constant level of 14C is maintained, corresponding to 15.3 decay events per minute. Once living matter has died, carbon contained in the matter is not exchanged with the surroundings, and the amount of 14C that remains in the dead material decreases with time due to radioactive decay. Consider a piece of fossilized wood that demonstrates 2.4 14C decay events...
When a plant or an animal dies, its 14C content decreases with a half-life 5730 years....
When a plant or an animal dies, its 14C content decreases with a half-life 5730 years. If an archeologist finds an ancient firepit containing partially consumed firewood and the 14C content of the wood is only 15% that of an equal carbon sample from a present-day tree, what is the age of the ancient site?
The half-life for the radioactive decay of C-14 is 5730 years. If a sample of C-14...
The half-life for the radioactive decay of C-14 is 5730 years. If a sample of C-14 initially contains 1.6 mmol of C-14, how many millimoles will be left after 2250 years?
The half-life for the radioactive decay of C−14 is 5730 years. If a sample of C−14...
The half-life for the radioactive decay of C−14 is 5730 years. If a sample of C−14 initially contains 1.7 mmol of C−14, how many millimoles will be left after 2250 years? Express your answer using two significant figures.
The half-life for the radioactive decay of C−14 is 5730 years. A) How long will it...
The half-life for the radioactive decay of C−14 is 5730 years. A) How long will it take for 30% of the C−14 atoms in a sample of C−14 to decay? B) If a sample of C−14 initially contains 1.9 mmol of C−14, how many millimoles will be left after 2280 years?
A 2.10-g sample of wood from an archaeological site gave 8600 disintegrations of 14C in a 10-hour...
A 2.10-g sample of wood from an archaeological site gave 8600 disintegrations of 14C in a 10-hour measurement. In the same time, a 2.10-g modern sample gave 19000 disintegrations. Calculate the age of the wood. The half-life of carbon-14 is 5730 years.
Chem 142, Dr. Haefner 3 s. The radioactive decay of l4C is frst order, and the half-life is 5800 years While a plant or anim ng, it has a constant proportion of 14C (relative to 12C) in its composition. When the organism dies, the proportion of 14C decreases as a result of radioactive decay, and the age of the organism can be determined if the proportion of carbon-14 in its remains is measured. If the proportion of 14C in an...
When a plant or an animal dies, its 14C content decreases with a half-life 5730 years. If an archeologist finds an ancient firepit containing partially consumed firewood and the 14C content of the wood is only 15% that of an equal carbon sample from a present-day tree, what is the age of the ancient site?
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