Part C Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 33.0 % of an Am-241 sample to decay? Express your answer with the appropriate units. View Available Hint(s) t = Value μÀ Submit Previous Answers Part D X Incorrect; Try Again; 3 attempts remaining O Show Transcribed Text Units Submit A fossil was analyzed and determined to have a carbon-14 level that is 80 % that of living organisms. The half-life of C-14 is 5730 years. How old is the fossil? Express your answer with the appropriate units. ► View Available Hint(s) μA t = Value ? Units ?

Part C Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 33.0 % of an Am-241 sample to decay? Express your answer with the appropriate units. View Available Hint(s) t = Value μÀ Submit Previous Answers Part D X Incorrect; Try Again; 3 attempts remaining O Show Transcribed Text Units Submit A fossil was analyzed and determined to have a carbon-14 level that is 80 % that of living organisms. The half-life of C-14 is 5730 years. How old is the fossil? Express your answer with the appropriate units. ► View Available Hint(s) μA t = Value ? Units ?

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...

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Macmillan l 30: F2 W S A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: #3 H 80 F3 mmand E D A GA $ X C 4 OOD 886 F4 R F % от ото 5 V F5 T G ^ 6 B F6 Y & 7 H 8 F7 U N 00 * 8 DII FB J L - ( 9 M K DD F9 O . V - ... I 4 F11 { [ option + = ? 11 1 F12 } ] half-lives delete return st
a) Mrs. Price's son, Liam is currently working as a boilermaker at the Darlington Nuclear Power plant. He is working with Uranium-237 which has a half-life of 13.75 days. What mass of an initial sample of 567.5g of uranium-237 would remain after 56 days? b) Write the complete reaction for the decay of Po-210 if it undergoes 2 consecutive alpha decay followed by a beta decay followed by another alpha decay.
The half-life of thorium-243 is 24 days. If a sample contains 8 units, how much will remain after 120 days? Please type out this answer or print it very neatly. The last time I asked somebody to answer this question I couldn't read it. Please show the work but no explanation, I need to see an answer to be able to use it in the future to solve similar problems. Thank you
For a radioactive sample with a half-life of about 94 days, storage in a lead lined cabinet for a sufficient length of time assures it will be safe before disposal. A radioactive sample is considered to be safe after 10 half-lives have expired. What percentage of the original radioactivity of the sample remains after this many half- lives? Report answer as a percentage, but do not include the percent symbol. Provide 3 significant digits of precision.
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1:39 Thu May 9 Done AA ⚫ prod02-cnow-owl.cengagenow.com Chapter 11 Homework [References] Question 1 1 pt Question 2 1 pt Question 3 O 1 pt Question 4 1 pt In the Po-218 natural decay series, the Po-218 initially undergoes a decay, the resulting daughter emits a ẞ particle, and the succeeding daughters emit a a decay series. and ẞ particle in that order. Determine the product of each step in the Po-218 Enter the symbol, mass number and atomic number of each product. (Express your answer as an isotope.) Question 5 1 pt Step 1: a decay Question 6 1 pt Step 2: ẞ decay Question 7 1 pt Step 3: a decay Question 8 1 pt Question 9 1 pt Step 4: ẞ decay Question 101 pt Submit Answer Try Another Version 3 item attempts remaining Question 11 1 pt Question 12 1 pt Question 13 1 pt Question 14 1pt Question 151 pt Question 16 1 pt Question 17 1 pt Question 18 1 pt Question 19 1 pt Question 20 1 pt Visited ≈ 21% 0
Bismuth-210 is beta emitter with a half-life of 5.0 days. Part A If a sample contains 1.5 g of Bi-210 (atomic mass = 209.984105 amu), how many beta emissions would occur in 13.9 days? Express your answer using two significant figures. 195] ΑΣΦ Submit Part B Request Answer Submit ? If a person's body intercepts 5.3 % of those emissions, to what dose of radiation (in Ci) is the person exposed? Express your answer using two significant figures. VE ΑΣΦ Request Answer beta decays ? Ci