This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay. If ... (Read 13 times)

nanna

  • Full Member
  • ***
  • Posts: 159
on: Nov 5, 2023

Question 1

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238.  The half-life of the decay series U-238 → Pb-206 is 4.5 × 109 yr.  Assuming no Pb-206 was present in the rock initially, how old is the rock?
◦ 1.7 × 109 yr
◦ 5.2 × 109 yr
◦ 2.7 × 106 yr
◦ 4.5 × 109 yr
◦ 2.4 × 109 yr

Question 2

A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay.  If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?
◦ 4.38 × 10–2 yr
◦ 11.4 yr
◦ 0.25 yr
◦ 15.8 yr
◦ 9.1 yr
Chemistry ¦ Chang, Goldsby ¦ 11th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by nanna on Nov 5, 2023

Jaclyn92G6

  • Full Member
  • ***
  • Posts: 176
    • save money with coupon codes
Reply #1 on: Nov 5, 2023
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.
Answer Preview
Only 25% of students answer this correctly

Look for coupons that come in delivers while in the email, in mags, or with in the inserts with all the Sunday forms. www.baccarat35.com

nanna

  • Member
  • Posts: 159
Reply 2 on: Nov 5, 2023
Gracias!

jamesnevil303

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

The “Old Man” from La Chapelle shows evidence of extensive tooth loss and bone resorption. The “Old Man” from La Chapelle shows evidence of extensive tooth loss and bone resorption.
Relationship Between Physical Activity and Improved Health Benefits Relationship Between Physical Activity and Improved Health Benefits
Sample Advance Directive Cont. Sample Advance Directive Cont.
One Minute Sit-up Test for Abdominal Muscle Strength and Endurance. One Minute Sit-up Test for Abdominal Muscle Strength and Endurance.
Monitoring shows that many forms of air pollution have decreased Monitoring shows that many forms of air pollution have decreased
Annotation of a DNA sequence containing part of the human beta globin gene Annotation of a DNA sequence containing part of the human beta globin gene
Video: Phases of the Female Reproductive Cycle - Hormonal regulation

For a complete list of videos, visit our video library