3 A twig from a bristlecone pine tree is found in a sedimentary layer, and its age is to be determined. The twig is a 7.0-gram piece of cellulose (C6H10O5: molar mass = 162 g/mole). This specimen is taken and placed between scintillation detectors, and over a 24-hour period 26,500 decays were recorded. How old is this twig? Assume that when the tree was living, carbon-14 accounted for 1 out of every 7.2x1011 atoms of carbon. The half-life of carbon-14 is 5730 years.

3 A twig from a bristlecone pine tree is found in a sedimentary layer, and its age is to be determined. The twig is a 7.0-gram piece of cellulose (C6H10O5: molar mass = 162 g/mole). This specimen is taken and placed between scintillation detectors, and over a 24-hour period 26,500 decays were recorded. How old is this twig? Assume that when the tree was living, carbon-14 accounted for 1 out of every 7.2x1011 atoms of carbon. The half-life of carbon-14 is 5730 years.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

If a tree dies and the trunk remains undisturbed for 1.170 × 10' years, what percentage of the original 1"C is still present? (The half-life of 1"C is 5730 years.) FER 28 étv МacВook Air 80 888 DI F1 F2 F3 F4 F5 F6 F7 F8 @ # $ % & 1. 2 3 4 7 8 Q W E R Y U < CO
Iodine-131 (half-life = 8.02 days) tracer with 214 counts per minute was added to water as iodide ion to measure plant growth. After 30.0 days the counts per minute was measured to be 15.7 counts per minute. How much I-131 tracer did the plant absorb?
A radioactive parent isotope with 600 atoms. After the decay, 450 daughter atoms were produced. Calculate the age of the rock if you know that the half-life of the parent isotope is 15 million years .
A certain substance is known to decay at a rate proportional to the present amount. Initially, there are y grams of the substance and after y2 years, the substance that remains is 0.25y grams, determine the initial amount y (in grams) if the half – life of the substance is [(ln 2) / y] in years.
Complete the following nuclear reaction: 14N + He →→ + H Example of answer: If your answer is ¹4N, write it as 14N (it is clear tha protons, so the number 7 might be skipped). If your answer is n (neutra For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial V V 10pt Click Save and Submit to save and submit. Click Save All Answers to save all answers.
3
The ratio of C-14 to C-12 in a piece of wood from an archeological site was found to be only 0.354 of what it is in a piece of wood taken from a tree today. In years, what is the age of the wood based on this C-14 measurement? The half-life of C-14 is 5730 years. Provide answer rounded to the nearest year but do not put units in the answer box. Your Answer: SU Your Answer
.Determine the decay constant of 1 g of pure K40 that is experimentally determined to emit about 105 radiations/sec
If a tree dies and the trunk remains undisturbed for 1.620 × 10* years, what percentage of the original 14C is still present? (The half-life of 14C is 5730 years.) 4 esc F2 @ 2$ % & 4 5 8 Q W Y tab A F G caps lock C V N shift エく0 H %# 3
se: 2021SP Art App... Please use the values in the resources listed below instead of the textbook values. Technetium-99m has a half life of 6.01 hours. If a patient injected with technetium-99m is safe to leave the hospital once 78.5% of the dose has decayed, how many hours after the injection is the patient allowed to leave? 4.0 h t.
The remnants of an ancient fire in a cave in africa showed a 146C decay rate of 3.9 counts per minute per grams of carbon. if the decay rate in C-14 in freshly cut wood, is 13.6 counts per mintue per gram of carbon, how many years ago did the campfire occur?
Archeologists continue to debate the arrival of the first humans in the Western Hemisphere. Radiocarbon dating of charcoal from a cave in Chile was used to establish the earliest date of human habitation in South America as 8700 years ago. This procedure involves comparing the 14C present in a sample of charcoal to the 14C present in a living tree of the same age. What fraction of the 14C initially present remained in the charcoal after 8700 years? The half-life of 14C is 5730 years. (Write the answer as a number with a decimal.)