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Author Question: A wooden object from a prehistoric site has a carbon-14 activity of 10 cpm compared to 40 cpm for ... (Read 74 times)

BrownTown3

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on: Jun 7, 2021

Question 1

Iodine-123, which is used for diagnostic imaging in the thyroid, has a half-life of 13 h.  If 50.0 mg of I-123 were prepared at 8:00 A.M. on Monday, how many mg remain at 10:00 A.M. on the following day?
◦ 6.25 mg
◦ 50.0 mg
◦ 3.13 mg
◦ 25.0 mg
◦ 12.5 mg

Question 2

A wooden object from a prehistoric site has a carbon-14 activity of 10 cpm compared to 40 cpm for new wood. If carbon-14 has a half-life of 5730 yr, what is the age of the wood?
◦ 5730 yr
◦ 17 200 yr
◦ 1430 yr
◦ 22 900 yr
◦ 11 500 yr
Chemistry: An Introduction to General, Organic, and Biological Chemistry ¦ Timberlake ¦ 13th Edition
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Marked as best answer by BrownTown3 on Jun 7, 2021

jxjsniuniu

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Reply #1 on: Jun 7, 2021
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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BrownTown3

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Reply 2 on: Jun 7, 2021
Great answer, keep it coming :)

helenmarkerine

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Reply 3 on: Yesterday
Gracias!

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