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 7 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
Excellent

AISCAMPING

  • Member
  • Posts: 347
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Effects of Therapy for Stuttering A functional MRI scan shows regions of the superior temporal lobe Effects of Therapy for Stuttering A functional MRI scan shows regions of the superior temporal lobe
Sample Exercise Program for Limited Older Adults (cont.) Sample Exercise Program for Limited Older Adults (cont.)
The posted octane rating in most high-altitude areas shows regular at 85 instead of the usual 87. The posted octane rating in most high-altitude areas shows regular at 85 instead of the usual 87.
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
Brain Hemisphere Activity Brain Hemisphere Activity
The height of your the rope after 1 minute to the nearest tenth of a meter is? The height of your the rope after 1 minute to the nearest tenth of a meter is?
Video: Griffith's experiments

For a complete list of videos, visit our video library