This topic contains a solution. Click here to go to the answer

Author Question: Potassium-40 decays to argon-40 with a half-life of 1.27 109 yr. The age of a mineral sample that ... (Read 73 times)

Zoey63294

  • Hero Member
  • *****
  • Posts: 539

Question 1

A rock contains 0.413 mg of lead-206 for each milligram of uranium-238. The for the decay of uranium-238 to lead-206 is 4.5 × 109 y. The rock was formed ________ y. ago.
◦ 4.80 × 109
◦ 3.10 × 109
◦ 2.53 × 109
◦ 7.34 × 109
◦ 1.86 × 109

Question 2

Potassium-40 decays to argon-40 with a half-life of 1.27 × 109 yr. The age of a mineral sample that has a mass ratio of 40Ar to 40K of 0.412 is ________ y.
◦ 2.26 × 109
◦ 1.62 × 109
◦ 7.55 × 108
◦ 6.32 × 108
◦ 5.23 × 108


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by Zoey63294 on Nov 18, 2019

Chou

  • Sr. Member
  • ****
  • Posts: 335
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 58% of students answer this correctly




Zoey63294

  • Member
  • Posts: 539
Reply 2 on: Nov 18, 2019
Excellent


gcook

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

For a complete list of videos, visit our video library