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

Author Question: The half-life of 19N is 0.42 s. What is the decay constant for this isotope? a. 1.7 1011 Ci b. ... (Read 169 times)

dejastew

  • Hero Member
  • *****
  • Posts: 562
on: Jul 28, 2018
The half-life of 19N is 0.42 s. What is the decay constant for this isotope?
 a. 1.7  1011 Ci
  b. 1.7 s1
  c. 1.1 s1
  d. The decay constant is not defined for a half-life of less than one second.

Question 2

The half-life of radioactive Technetium-99 is 6.0 hours. Find the number of 99Tc nuclei necessary to produce a sample of activity 18 Ci. (1 Ci = 3.7  1010 decays/second)
 a. 1.2  109
  c. 8.0  108
  b. 3.4  1011
  d. 2.1  1010


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

moormoney

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

D


dejastew

  • Member
  • Posts: 562
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

amynguyen1221

  • Member
  • Posts: 355
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

The seed-to-seed life of flowering plants. The seed-to-seed life of flowering plants.
Basic energy of a human life Basic energy of a human life
The Scale of Life The Scale of Life
Lycophyte Life Cycle Lycophyte Life Cycle
I Am The Bread of Life Suzanne Toolan with Lyrics Catholic Hymn Song Sunday 7pm Choir I Am The Bread of Life Suzanne Toolan with Lyrics Catholic Hymn Song Sunday 7pm Choir
Complete Life cycle of cherry (Prunus), a eudicot Complete Life cycle of cherry (Prunus), a eudicot
Video: Genetic distance between human groups

For a complete list of videos, visit our video library