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 13 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
YES! Correct, THANKS for helping me on my review

  • Member
  • Posts:
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Palpation of the Liver, Bimanual Method Palpation of the Liver, Bimanual Method
Oxidation of Fe-bearing minerals gives rocks, soils rusty color. Oxidation of Fe-bearing minerals gives rocks, soils rusty color.
Metamorphic Rocks Metamorphic Rocks
Pavlov’s Method Pavlov’s Method
Detrital Sedimentary Rocks Detrital Sedimentary Rocks
Chemical, Biochemical, and Organic Sedimentary Rocks Chemical, Biochemical, and Organic Sedimentary Rocks
Video: Action potentials - electrical characteristics and generation

For a complete list of videos, visit our video library