A sample of corn from an extinct civilization has a decay rate of 9.5 decays per minute per gram of carbon. Assuming that the decay rate of C-14 in the atmosphere is 15 decays per min per gram of carbon and the 1st-order decay rate for C-14 is 1.21x10-4 years1 (i.e., the half-life = 5,730 years), what is the age of %3D the corn. A) 2470 years B) 2940 years C) 3780 years D) 4390 years

1. 00 wa nuias arner 4.0 days'? 10.6. A sample of S, a ß- emitter, has an activity of 0.100 µCi. In 20.0 days, the activity of the sample has declined to 0.0853 µCi. What is the half-life of S? 60. 16.

10. nas Ciapscu. 10.8. The half-life of 190Tc, a ß- emitter, is 15.8 s. (a) How many atoms of 199Tc are present in a sample with an activity of 0.200 µCi. (b) What is the mass of the sample? 43 10.0 55c Whot m

In a living organism, the decay of C-14 produces 15.3 disintegrations per minute per gram of carbon. The half-life of C- 14 is 5730 years. A 2.7 g sample of bone has 39.2 disintegrations per minute. How old is the bone sample in years? Answer:

se: 2021SP Art App... Please use the values in the resources listed below instead of the textbook values. Technetium-99m has a half life of 6.01 hours. If a patient injected with technetium-99m is safe to leave the hospital once 78.5% of the dose has decayed, how many hours after the injection is the patient allowed to leave? 4.0 h t.

Oxygen-22 disintegrates into Fluorine with a decay rate of  λ = 0.315 per seconds. Considering an initial amount of Oxygen 22, which percentage of it will be left after 5.8 seconds? Keep three significant digits.

A radioactive isotope has a half-life of 14.8 hrs. Calculate its rate constant.  Show work

Hi, I need help with this step-by-step, please. Thank you.    Even more interesting is how the researchers determined the age of the sharks. Normally, youcould look at the decay of carbon-14 in the bone of an animal to determine its age. By comparingthe current amount of carbon-14 in the bone to the amount of carbon-14 that was in the boneinitially, you can determine how much time has passed (the age of the animal). This doesn’twork with Greenland sharks, though! Greenland sharks don’t have bones. They just havecartilage. Researchers determined, however, that the carbon-14 in certain proteins in the eye lensof the sharks could be dated because those proteins are set from the time that the shark is bornand are never replaced (most proteins in living organisms are constantly being broken down andreplaced, but not these proteins in the eye lens of the Greenland shark!).[Here’s the problem to solve and the information you need to solve it.] Let’s assume thatresearchers find a new Greenland…

21) Americium-241 is a radioactive isotope with a half-life of 433 yrs. What is thefirst order rate constant for the decay of this isotope?​a) 2.30 x 10-3 /yr ​b) 433 yrs ​c) 1.60 x 10-3 /yr ​d) 625/yr​e) cannot be determined without knowing the initial concentration

A certain drug has a half-life in the body of 7.5 h. What should the interval betwe 60.% of its initial concentration? Round your answer to 2 significant digits.