An old piece of wood's coal's mass is 118g and activity 11 Bq. How old is...
An old piece of wood's coal's mass is 118g and activity 11 Bq. How old is the piece? Out of natural coal, the radioactive part is f = 1.3 * 10^-12 and its half-life is 5730 years. A year has on average 3.156 * 10^7 seconds. Give your answer in years.
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An old piece of wood's coal's mass is 118g and activity 11 Bq.
How old is...
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to...
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to 7.5-10 Bq. Calculate the half life of the sample. [2 marks]
A sample of radioactive material contains 1.1E15 atoms and has an activity of 6.3E11 Bq. What...
A sample of radioactive material contains 1.1E15 atoms and has
an activity of 6.3E11 Bq. What is its half-life?
A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...
Radiocarbon or 14C is a widely used tracer for groundwater movement for up to 30,000 years....
Radiocarbon or 14C is a widely used tracer for groundwater movement for up to 30,000 years. 14C can be used to estimate recharge rates and horizontal flow rates important for water related policy decisions. 14C has a half-life of 5730 years and the ratio of 14C to all C from biological material is 1.3 × 10−12. The atomic mass of carbon is 12.0107 g/mol. Your sample is 0.29 g of carbon. The activity of this sample, due to presence of...
A sample of radioactive material is initially found to have an activity of 114 Bq. After...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
11. (5 pt) For a 1 mCi sample, what is the activity of 18F in Bq?...
11. (5 pt) For a 1 mCi sample, what is the activity of 18F in Bq? 18F decays by positron emission with a half-life of 109 minutes. a. 3.7 x 104 Bq b. 3.7 x 107 Bq c. 3.7 x 1010 Bq d. 2.7 x 10-3 Bq e. 2.7 x 10-11 Bq
Radioactive Carbon-11 has a half life of only 20.3 minutes and an atomic mass number of...
Radioactive Carbon-11 has a half life of only 20.3 minutes and an atomic mass number of 11 u. Calculate the activity of 3.58 g of Carbon-11. Answer should be in Bq.
Part A: Tritium is a radioactive isotope of the element hydrogen. Tritium has a half-life of...
Part A: Tritium is a radioactive isotope of the element hydrogen. Tritium has a half-life of 12.5 years. How many years would it take until only 3.22% of a sample remain? Answer should be in years. Part B: Radioactive Carbon-11 has a half life of only 20.3 minutes and an atomic mass number of 11 u. Calculate the activity of 3.58 g of Carbon-11. Answer should be in Bq.
What mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq?
What mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq? The mass of 14C is 14.00 u, and 1 u = 1.6605 × 10-27 kg.A) 8.68 × 10-13 kg B) 5.38 × 10-19 kg C) 1.70 × 10-12 kg D) 3.84 × 10-20 kg
What mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq?
This problem has been solved!See the answerWhat mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq? The mass of 14C is 14.00 u, and 1 u = 1.6605 × 10-27 kg.A) 8.68 × 10-13 kg B) 5.38 × 10-19 kg C) 1.70 × 10-12 kg D) 3.84 × 10-20 kg
(11%) Problem 7: In a living organism, a fixed fraction l 30 x 10-12 of 12C...
(11%) Problem 7: In a living organism, a fixed fraction l 30 x 10-12 of 12C is the radioactive isotope 14C, which has a half life of 5730 y ▲ What is the activity of the 14C in 2.1 g of 12C found in living tissue in Ba?
12. A radioactive sample takes 3.5 minutes to reduce its activity from 2.0 10 Bq to 7.5-10 Bq. Calculate the half life of the sample. [2 marks]
A sample of radioactive material contains 1.1E15 atoms and has
an activity of 6.3E11 Bq. What is its half-life?
A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
11. (5 pt) For a 1 mCi sample, what is the activity of 18F in Bq? 18F decays by positron emission with a half-life of 109 minutes. a. 3.7 x 104 Bq b. 3.7 x 107 Bq c. 3.7 x 1010 Bq d. 2.7 x 10-3 Bq e. 2.7 x 10-11 Bq
(11%) Problem 7: In a living organism, a fixed fraction l 30 x 10-12 of 12C is the radioactive isotope 14C, which has a half life of 5730 y ▲ What is the activity of the 14C in 2.1 g of 12C found in living tissue in Ba?
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