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?
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The half-life of 14C is 5730 years. A sample contains 92.1 % of the 14C that...
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)...
PS2.7 The half-life for the (first-order) radioactive decay of 14C is 5730 years. An archaeological sample contained wood that had only 69 percent of the 14C found in living trees. What is its age?
The half-life of 14C is 5730 years. The activity of carbon in living being is 12.5 counts per minute per gram of carbon. Calculate the activity of carbon from the remains of an organism that died 50,000 years ago.
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?
Question 1 : The reaction A(aq) ---> B(aq) is a first order reaction with respect to A(aq). The concentration of A(aq) is reduced to 33.1 % of its initial value in 1.54 minutes. What is this reaction's half-life (in s)? Question 2 : The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 91.0 s at 25.0oC and its half-life is 69.2 s at 45.0oC. What is its half-life (in s) at 65.0oC? ...
Question 2 : The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 87.1 s at 25.0°C and its half-life is 65.8 s at 45.0°C. What is its half-life (in s) at 65.0°C? Question 3 : The half-life of 14C is 5730 years. A sample contains 90.9 % 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?
Can a magnetic field do work on a charge? yes no The half-life of 14C is 5730 years. Explain how we can use this information to estimate the age of wood samples found in ancient campsites. Be explicit. Suppose the wood from an ancient campsite contains 1/128 of the 14C found in a present day sample. How old is the wood?
The half-life of 14C is 5730 yr. Find the number of disintegrations emitted by 1.0 mol of 14C in 1 minute. (Note: 1 year = 365.24 day). Express your answer using two significant figures.
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 initially contains 1.7 mmol of C−14, how many millimoles will be left after 2250 years? Express your answer using two significant figures.