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 35 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
Great answer, keep it coming :)

mochi09

  • Member
  • Posts: 335
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Sample Stress Management Program Sample Stress Management Program
Allosteric regulation of enzyme activity. Allosteric regulation of enzyme activity.
This battery shows a large “1000” on the front panel but this is the CA rating and not the ... This battery shows a large “1000” on the front panel but this is the CA rating and not the ...
Brain Hemisphere Activity Brain Hemisphere Activity
This table shows the growth of a crowd at a rally over a 3 h period. This table shows the growth of a crowd at a rally over a 3 h period.
What nuclide is produced when Pb-210 decays by beta emission? What nuclide is produced when Pb-210 decays by beta emission?
Video: Interpreting a cladogram Animation

For a complete list of videos, visit our video library