AR AND ORGANIC CHEMISTRYUnderstanding radioactive half lifeDENNISA medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 1.00 umol of the radionuclide.First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/8of the initial amount.radionuclidetime for amount ofinitial radioactivity radionuclide to decrease to1/8 of initial amountsamplesymbolhalf-life177Lu7.0 daysD daysA.|(choose one)71192Ir7774.0 daysdays(choose one)179Ta73Oyears2 years(choose one)122I534.0 minutesOminutes(choose one)(choose one)1 (highest)234 (lowest)ExplanationCheckPrivacyTerms of UseO 2019 McGraw-Hill Education. All Rights Reserved.II

Question
Asked Dec 1, 2019
173 views

First order the samples by decreasing initial video activity then calculate how long it will take for the amount of radionuclides in each sample to decrease to 1/8 of the initial amount

AR AND ORGANIC CHEMISTRY
Understanding radioactive half life
DENNIS
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 1.00 umol of the radionuclide.
First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/8
of the initial amount.
radionuclide
time for amount of
initial radioactivity radionuclide to decrease to
1/8 of initial amount
sample
symbol
half-life
177
Lu
7.0 days
D days
A.
|(choose one)
71
192
Ir
77
74.0 days
days
(choose one)
179
Ta
73
Oyears
2 years
(choose one)
122
I
53
4.0 minutes
Ominutes
(choose one)
(choose one)
1 (highest)
2
3
4 (lowest)
Explanation
Check
Privacy
Terms of Use
O 2019 McGraw-Hill Education. All Rights Reserved.
II
help_outline

Image Transcriptionclose

AR AND ORGANIC CHEMISTRY Understanding radioactive half life DENNIS A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 1.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/8 of the initial amount. radionuclide time for amount of initial radioactivity radionuclide to decrease to 1/8 of initial amount sample symbol half-life 177 Lu 7.0 days D days A. |(choose one) 71 192 Ir 77 74.0 days days (choose one) 179 Ta 73 Oyears 2 years (choose one) 122 I 53 4.0 minutes Ominutes (choose one) (choose one) 1 (highest) 2 3 4 (lowest) Explanation Check Privacy Terms of Use O 2019 McGraw-Hill Education. All Rights Reserved. II

fullscreen
check_circle

Expert Answer

Step 1

Calculation for time to decrease by 1/8 of initial amount of sample A:

help_outline

Image Transcriptionclose

Calculation for rate constant: 0.63 t1 к 0.693 t1 0.693 k = 7 days k 0.099 days-1 Calculation for time to decrease by 1/8 of initial amount: In NG -kt (1.0 umol) In 1.0 umol t = 0.099 t 21 days

fullscreen
Step 2

Calculation for time to decrease by 1/8 of initial amount of sample B:

help_outline

Image Transcriptionclose

Calculation for rate constant: 0.63 t1 K 0.693 k 0. 693 k 74 days k 9.364 x 10-3 days1 Calculation for time to decrease by 1/8 of initial amount: In N = -kt (1.0 umol) In 10μηοl t = 9.364 x 10-3 days-1 t 222 days

fullscreen
Step 3

Calculation for time to decrease by 1/8...

help_outline

Image Transcriptionclose

Calculation for rate constant: 0.63 t1 к 0.693 t1 0.693 k 2 years k 0.3465 years1 Calculation for time to decrease by 1/8 of initial amount: In NG -kt (1.0 umol) In 1.0 umol t = 0.3465 years-1 t 6 years

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: What amount of heat is required to vaporize 155.95 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)

A: Given,ΔHvap = 43.3 kj/molGrams = 155.95 g

question_answer

Q: 20% D Safari File Edit View History Bookmarks Window Help Mon 12:47 PM 4+ G newconnect.mheducation.c...

A: The polymer describes an unspecified number of monomer units is called polymer.

question_answer

Q: 3. List the types of intermolecu lar forces present in the following compounds. (a) HF (b) Br2 (c) H...

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you ar...

question_answer

Q: find Ksp

A: All known compounds can be dissolve in certain solvents whereas they remain insoluble in other solve...

question_answer

Q: How to approach the problem?

A: Reaction becomes faster when the bond strength decreases, the bond can be easily broken. Hence, the ...

question_answer

Q: Write the equilibrium expression for the following reaction: 4HNO3(1) <--> 4NO2(g) + H2O(g) + ...

A: Equilibrium constant: At equilibrium the ratio of products to reactants (each raised to the power co...

question_answer

Q: Use the molar bond enthalpy data in the table to estimate the Average molar bond enthalpies. (Hbond)...

A: Given data:

question_answer

Q: A 10.2−g sample of ethylene glycol, a car radiator coolant, loses 946 J of heat. What was the initia...

A: Given:Mass of ethylene glycol=10.2 gHeat loss (q)=946 JFinal temperature=32.5oCSpecific heat capacit...

question_answer

Q: An experimental plot of ln(Pvap) vs. 1/T is obtained in lab for an unknown liquid. The slope of the ...

A: Given,Slope = - 2530 KThe equation for the straight line is given below, Y = mx + c