7. Traces of burned wood along with ancient stone tools in an archeological dig in Chile were found to contain approximately 1.67% of the original amount of carbon 14. If the half- life of carbon 14 is 5730 years, approximately when was the tree cut and burned?

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Q: 12. A 4000 mg sample of bismuth decays to 500 mg in 18 minutes. What is its half-life?

A:

Q: HOw old iSamummy that has lost 497. Carbon-14, The half-life for Carbon-14 iS 5 730 years.

A: Given query is to find the the age of the mummy.

Q: A wooden artifact from an ancient tomb contains 20 percent of the carbon-14 that is present in…

A:

Q: A wooden artifact from an ancient tomb contains 25 percent of the carbon-14 that is present in…

A:

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A:

Q: Determine the half-life of a particular element if 200gr of that element decays to 15 gr in 12…

A: Given: 200 gr of an element decays to 15 gr in 12 hrs. To find: Half-life of an element.

Q: A sample of radium has a weight of 1.5 mg and a half life of approximately 6 years. How much of the…

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Q: 7) Cobalt -60 has a half life of 5.4 years. A sample of 75 mg is present today. a) Write an equation…

A:

Q: 4. How old is a hominid skull with 30% of its original C14 concentration, given that the half-life…

A: Not required.

Q: 4. The population of Lalaland is 600,000 currently and is expected to grow (continuously) at 3.5%…

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Q: Element X decays radioactively with a half life of 9 minutes. If there are 170 grams of Element X,…

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Q: The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that a…

A: The half life is 5750 years. Amount of carbon-14 lost is 28%.

Q: 2. Assume that radium disintegrates/decomposes at a rate proportional to the amount present. If 100…

A: