Chemical Principles: The Quest for Insight
7th Edition
ISBN: 9781464183959
Author: Peter Atkins, Loretta Jones, Leroy Laverman
Publisher: W. H. Freeman
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 10, Problem 10B.2E
(a)
Interpretation Introduction
Interpretation:
The half life period of Potassium-40 has to be given.
Concept Introduction:
Half life period:
The half life is defined as the amount of time it takes for a given isotope to lose half of its radioactivity.
Where k is the decay constant.
(b)
Interpretation Introduction
Interpretation:
The half life period of Cobalt-60 has to be given.
Concept Introduction:
Refer to part (a).
(c)
Interpretation Introduction
Interpretation:
The half life period of Nobelium-255 has to be given.
Concept Introduction:
Refer to part (a).
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A 1.50 x 10-6 M solution of Khal Drogo’s potion was prepared by Daenerys in 1948 to make him stronger for the upcoming battle of the thrones. But later that night, Khal Drogo was killed by their mage. The potion was buried and it was discovered by Arya in 1978.
(a)What is the number of moles remaining in the potion if the half-life is 30 years.
(b) Assuming that Daenerys’ dragon breathed fire (about 2000 deg C) on the potion and this turned to gas, what is the volume of the potion dissipated in the standard atmosphere?
The radioactive isotope plutonium 241 decays in a manner satisfying the differential equation d/dt =−0, 0525x, where x is measured in grams and t in years. Determine the half-life of plutonium 241.
The isotope of plutonium
238,
°Pu is used to make thermoelectric power sources for spacecraft. Suppose that a space probe was
238,
launched in 2012 with 3.5 kg of
°Pu.
Part: 0 / 2
Part 1 of 2
(a) If the half-life of
238,
Pu is 87.7 yr, write a function of the form Q (t) = Qe
-kt
to model the quantity Q (t) of
238.
Pu left
after t years. Round the value of k to five decimal places. Do not round intermediate calculations.
Q (t) =
Chapter 10 Solutions
Chemical Principles: The Quest for Insight
Ch. 10 - Prob. 10A.1ASTCh. 10 - Prob. 10A.1BSTCh. 10 - Prob. 10A.2ASTCh. 10 - Prob. 10A.2BSTCh. 10 - Prob. 10A.3ASTCh. 10 - Prob. 10A.3BSTCh. 10 - Prob. 10A.1ECh. 10 - Prob. 10A.2ECh. 10 - Prob. 10A.3ECh. 10 - Prob. 10A.4E
Ch. 10 - Prob. 10A.5ECh. 10 - Prob. 10A.6ECh. 10 - Prob. 10A.7ECh. 10 - Prob. 10A.8ECh. 10 - Prob. 10A.9ECh. 10 - Prob. 10A.10ECh. 10 - Prob. 10A.11ECh. 10 - Prob. 10A.12ECh. 10 - Prob. 10A.13ECh. 10 - Prob. 10A.14ECh. 10 - Prob. 10A.15ECh. 10 - Prob. 10A.16ECh. 10 - Prob. 10A.17ECh. 10 - Prob. 10A.18ECh. 10 - Prob. 10A.19ECh. 10 - Prob. 10A.20ECh. 10 - Prob. 10A.21ECh. 10 - Prob. 10A.22ECh. 10 - Prob. 10A.23ECh. 10 - Prob. 10A.24ECh. 10 - Prob. 10A.25ECh. 10 - Prob. 10A.26ECh. 10 - Prob. 10B.1ASTCh. 10 - Prob. 10B.1BSTCh. 10 - Prob. 10B.2ASTCh. 10 - Prob. 10B.2BSTCh. 10 - Prob. 10B.1ECh. 10 - Prob. 10B.2ECh. 10 - Prob. 10B.3ECh. 10 - Prob. 10B.4ECh. 10 - Prob. 10B.5ECh. 10 - Prob. 10B.6ECh. 10 - Prob. 10B.7ECh. 10 - Prob. 10B.8ECh. 10 - Prob. 10B.9ECh. 10 - Prob. 10B.10ECh. 10 - Prob. 10B.11ECh. 10 - Prob. 10B.12ECh. 10 - Prob. 10B.13ECh. 10 - Prob. 10B.17ECh. 10 - Prob. 10B.18ECh. 10 - Prob. 10B.19ECh. 10 - Prob. 10C.1ASTCh. 10 - Prob. 10C.1BSTCh. 10 - Prob. 10C.2ASTCh. 10 - Prob. 10C.2BSTCh. 10 - Prob. 10C.1ECh. 10 - Prob. 10C.2ECh. 10 - Prob. 10C.3ECh. 10 - Prob. 10C.4ECh. 10 - Prob. 10C.5ECh. 10 - Prob. 10C.6ECh. 10 - Prob. 10C.7ECh. 10 - Prob. 10C.8ECh. 10 - Prob. 10C.9ECh. 10 - Prob. 10C.10ECh. 10 - Prob. 10.1ECh. 10 - Prob. 10.2ECh. 10 - Prob. 10.3ECh. 10 - Prob. 10.4ECh. 10 - Prob. 10.6ECh. 10 - Prob. 10.8ECh. 10 - Prob. 10.9ECh. 10 - Prob. 10.10ECh. 10 - Prob. 10.12ECh. 10 - Prob. 10.15ECh. 10 - Prob. 10.17ECh. 10 - Prob. 10.19ECh. 10 - Prob. 10.20ECh. 10 - Prob. 10.21E
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- The isotope S3890r one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 y. Calculate the half-life.arrow_forwardStrontium-90 (Sr-90), a radioactive isotope of strontium, is present in the fallout resulting from nuclear explosions. It is especially hazardous to animal life, including humans, because, upon ingestion of contaminated food, it is absorbed into the bone structure. Its half-life is 27 yr. If the amount of Sr-90 in a certain area is found to be eight times the "safe" level, find how much time must elapse before an "acceptable level" is reached.arrow_forwardStrontium-90 is a radioactive material that decays according to the function A(t)=A0e−0.0244t, where A0 is the initial amount present and A is the amount present at time t (in years). Assume that a scientist has a sample of 500 grams ofstrontium-90. (a) What is the decay rate of strontium-90? (b) How much strontium-90 is left after 40years? (c) When will only 300 grams of strontium-90 be left? (d) What is the half-life of strontium-90?arrow_forward
- (a) If exactly 1.00 μg of 226Ra was used to paint the glow-in-the-dark dial of a wristwatch made in 1914, how radioactive is the watch in 1955? Express your answer in becquerels (Bq). The half-life of 226Ra is 1.60 ×× 103 years. (b) Express your answer from above in microcuries (μCi).arrow_forwardThe half-life of cesium-137 is 30 years. Suppose we have a 12-g sample. (a) Find a function m(t) = m02−t/h that models the mass remaining after t years. (b) Find a function m(t) = m0e−rt that models the mass remaining after t years. (Round your r value to four decimal places.) (c) How much of the sample will remain after 63 years? (Round your answer to one decimal place.) (d) After how many years will only 4 g of the sample remain? (Round your answer to the nearest whole number.)arrow_forwardScientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to radioactive isotope of carbon, 14C, with a half-life of about 5730 years. Vegetation absorbs carbon dioxide through the atmosphere and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon and the amount of ¹4C begins to decrease through radioactive decay. Therefore the level of radioactivity must also decay exponentially. A parchment fragment was discovered that had about 74% as much 14C radioactivity as does plant material on earth today. Estimate the age of the parchment. (Round your answer to the nearest whole number.) yr Need Help? Watch It Additional Materials eBookarrow_forward
- (a) When a lithium-7 nucleus is bombarded by a proton, two alpha particles (4He) are produced. Find the reaction energy. (b) Calculate the reaction energy for the reaction 42He + 14 7N S 17 8O + 11 H.arrow_forwardRadioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? S`1 (b) A sample contains 22.0 mg ⁹⁹Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? daysarrow_forwardSome watch dials are coated with a phosphor, like ZnS, and a polymer in which some of the 1 H atoms have been replaced by 3H atoms, tritium. The phosphor emits light when struck by the beta particle from the tritium decay, causing the dials to glow in the dark. The half-life of tritium is 12.3 yr. If the light given off is assumed to be directly proportional to the amount of tritium, by how much will a dial be dimmed in a watch that is 50 yr old?arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co
Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Chemistry: Matter and Change
Chemistry
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Glencoe/McGraw-Hill School Pub Co
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning