A sample contains 80% of radioactive Carbon 13C. Calculate the age of the sample if you...

A sample contains 80% of radioactive Carbon ¹³C. Calculate the age of the sample if you knew that the half time of Carbon isotope is 5730 year. Radioactive decay follows first-order reaction kinetics.

Expert Solution

Amanda K answered 1 year ago

An ancient wooden club is found that contains 80 g of carbon and has an activity...

An ancient wooden club is found that contains 80 g of carbon and has an activity of 7.5 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3×10−12.

An organic compound contains carbon, hydrogen, and sulfur. A sample of it with a mass of...

An organic compound contains carbon, hydrogen, and sulfur. A sample of it with a mass of 2.712 g was burned in oxygen to give gaseous CO2, H2O, and SO2. These gases were passed through 311.2 mL of an acidified 0.0200 M KMnO4 solution, which caused the SO2 to be oxidized to SO42-. Only part of the available KMnO4 was reduced to Mn2+. Next, 31.12 mL of 0.0300 M SnCl2 was added to 31.12 mL portion of this solution, which still...

How do you calculate the radioactive isotope inventory of all present elements when a sample 1g...

How do you calculate the radioactive isotope inventory of all present elements when a sample 1g of 5% U-235 and 95% U-238 is left to decay for a year?

Which of the following carbon atoms will display the signal most downfield in the 13C NMR...

Which of the following carbon atoms will display the signal most downfield in the 13C NMR spectrum? https://imgur.com/quYKwmQ The answer is B but can somebody explain why? Would we have to remember the ppm numbers or is there another way to figure out this answer? Thank you. EDIT: That is the whole question, there is no need for another structure to be added.

Radioactive decay can be used to determine the age of an object. If you know the...

Radioactive decay can be used to determine the age of an object. If you know the number of radioactive nuclei with which an object started, the number of radioactive nuclei currently present, and the half-life of the isotope, you can calculate the time since the object was created. Suppose an object was created with 4.810×109 nuclei of a particular isotope that has a half-life of 1.56×103 yr. At this point in time 9.620×108 nuclei of this particular isotope remain. What...

A sample has a activity of 0.0089 Bq per gram of carbon. (a) Find the age...

A sample has a activity of 0.0089 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have been as much as 44% larger. Repeat part (a), taking into account this 44% increase.

Radioactive isotopes often occur together in mixtures. Suppose a 220g sample contains 131Ba, with a half-life...

Radioactive isotopes often occur together in mixtures. Suppose a 220g sample contains 131Ba, with a half-life of 12 days, and 47Ca, with a half-life of 4.5 days. If there are initially twice as many calcium atoms as there are barium atoms, what will be the ratio of calcium atoms to barium atoms 2.10 weeks later? NCa/NBa = ?

5. A scientist proposes using radioactive tracers to demonstrate that the carbon atoms from carbon dioxide...

5. A scientist proposes using radioactive tracers to demonstrate that the carbon atoms from carbon dioxide end up incorporated into glucose molecules as the result of photosynthesis. In order to test this hypothesis, the scientist conducts the following experiment: A group of plants are illuminated with light of a wavelength that is optimal for photosynthesis. The light is turned off, and the plants are kept in darkness for all remaining steps in the investigation. Radiolabeled CO2 is introduced to the...

A 54.3 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu)....

A 54.3 mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu). If 29.6% of the chlorine atoms in the sample are chlorine-36 and the remainder is naturally occurring nonradioactive chlorine atoms, how many disintegrations per second are produced by this sample? The half-life of chlorine-36 is 3.0×105 yr. My answer: 1.77x10^7 please explain steps, thank you!

a 0.580 g sample of a compound containing only carbon and hydrogen contains .480 g of...

a 0.580 g sample of a compound containing only carbon and hydrogen contains .480 g of carbon and .100g of hydrogen. At STP 33.6mL of the gas has a mass of .087g. What is the molecular formula for the compound? The answer should be C4H10. Please explain with steps. Thank you.

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