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Author Question: The ratio of 238U to 206Pb is used to date old mineral samples. Each 1.000 g of 238U that decays ... (Read 85 times)

drink

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on: Feb 15, 2020

Question 1

An archeological artifact was subjected to radiocarbon dating. The artifact showed a carbon-14 decay rate of 13.8 disintegrations/min per gram of carbon. Carbon-14 has a half-life of 5715 years, and currently living organisms decay at the rate of 15.3 disintegrations/min per gram of carbon.  What is the approximate age of the artifact?
◦ 257 years old
◦ 591 years old
◦ 371 years old
◦ 851 years old

Question 2

The ratio of 238U to 206Pb is used to date old mineral samples. Each 1.000 g of 238U that decays eventually produces 0.866 g of 206Pb. If the half-life of 238U is 4.468 × 109 years, what is the age of a mineral that has a 238U/206Pb mass ratio of 2.00?
◦ 3.87 × 109 years
◦ 4.47 × 109 years
◦ 2.94 × 109 years
◦ 3.60 × 109 years
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by drink on Feb 15, 2020

SeanoH09

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Reply #1 on: Feb 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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drink

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Reply 2 on: Feb 15, 2020
Excellent

sultana.d

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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