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Author Question: The nuclide As-76 has a half-life of 26.0 hours. If a sample of As-76 weighs 344 g, what mass of ... (Read 99 times)

lb_gilbert

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on: Nov 18, 2019

Question 1

The age of an ancient tree trunk is estimated using radiocarbon dating. If the trunk has a C-14 decay rate that is 34% of what it is in living plants, how old is the trunk? The half-life of C-14 is 5730 years.
◦ 1.94 × 104 years
◦ 5.31 × 103 years
◦ 1.74 × 102 years
◦ 8.92 × 103 years
◦ 2.92 × 104 years

Question 2

The nuclide As-76 has a half-life of 26.0 hours. If a sample of As-76 weighs 344 g, what mass of As-76 remains after 538 minutes?
◦ 437 g
◦ 67.8 g
◦ 144 g
◦ 251 g
◦ 271 g
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Marked as best answer by lb_gilbert on Nov 18, 2019

memslove

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Reply #1 on: Nov 18, 2019
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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lb_gilbert

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Reply 2 on: Nov 18, 2019
Gracias!

covalentbond

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Reply 3 on: Yesterday
Excellent

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