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

Author Question: A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 ... (Read 32 times)

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
on: Jul 13, 2018
A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 grams. How much of the parent isotope will be present after three half-lives?
 A)4.5 grams
 B)9 grams
 C)18 grams
 D)54 grams
 E)63 grams

Question 2

Creep occurs only on weathered or soil-covered surfaces of moderate slope.
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Zack0mack0101@yahoo.com

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 13, 2018
Answer to Question 1

B

Answer to Question 2

False


sheilaspns

  • Member
  • Posts: 567
Reply 2 on: Jul 13, 2018
Wow, this really help

kjohnson

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

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?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria Diagram of the life cycle of Plasmodium falciparum, the causative agent of malaria
The Scale of Life The Scale of Life
The gender roles that we learn during childhood become part of our basic orientations to life. ... The gender roles that we learn during childhood become part of our basic orientations to life. ...
The chemical structure of the water molecule facilitates life The chemical structure of the water molecule facilitates life
Climate change occurs over millions of years Climate change occurs over millions of years
Raman has a line of credit loan with the ICICI bank. The initial loan balance was $72000.00. ... Raman has a line of credit loan with the ICICI bank. The initial loan balance was $72000.00. ...
Video: Haustral churning, Gastrocolic reflex and mass peristalsis & Defecation

For a complete list of videos, visit our video library