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

Author Question: The Rb-87/Sr-87 method of dating rocks is often used by geologists: t1/2 = 6.0 1010 yrEstimate ... (Read 39 times)

hgjjghgjh

  • Full Member
  • ***
  • Posts: 132
on: Nov 5, 2023

Question 1

The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 × 109 yr.  A sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms.  The age of the rock is
◦ 8.1 × 10–10 yr
◦ 2.4 × 109 yr
◦ 2.8 × 109 yr
◦ 4.6 × 109 yr
◦ 6.8 × 109 yr

Question 2

The Rb-87/Sr-87 method of dating rocks is often used by geologists:
           t1/2 = 6.0 × 1010 yr
Estimate the age of a rock sample in which the present-day mole ratio of Rb-87 to Sr-87 is 36:1.
◦ 2.4 × 109 yr
◦ 1.7 × 109 yr
◦ 3.1 × 1011 yr
◦ 4.1 × 10–11 yr
◦ 3.6 × 1011 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 hgjjghgjh on Nov 5, 2023

reason44

  • Full Member
  • ***
  • Posts: 162
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 29% of students answer this correctly


hgjjghgjh

  • Member
  • Posts: 132
Reply 2 on: Nov 5, 2023
Great answer, keep it coming :)

dyrone

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

The twin method can be used to investigate genetic and environmental influences on the development o The twin method can be used to investigate genetic and environmental influences on the development o
Testing for Glucose in Urine Using the Tablet Method Testing for Glucose in Urine Using the Tablet Method
Performing Venipuncture Using the Vacutainer Method Performing Venipuncture Using the Vacutainer Method
Performing Venipuncture Using the Vacutainer Method Performing Venipuncture Using the Vacutainer Method
How to perform the substitution method for definite integrals (Part 1) How to perform the substitution method for definite integrals (Part 1)
Resources from Rocks and Minerals Resources from Rocks and Minerals
Video: Introduction to Spirometry

For a complete list of videos, visit our video library