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 107 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
Great answer, keep it coming :)

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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.

Personality over the Life Span Personality over the Life Span
How to solve a half life problem involving exponential models (Question 2) How to solve a half life problem involving exponential models (Question 2)
Tree of life Tree of life
Life Expectancy in Developed Countries Life Expectancy in Developed Countries
Life cycle of a typical flowering plant. Life cycle of a typical flowering plant.
Life cycle of a conifer (pine) Life cycle of a conifer (pine)
Video: Lower Limb Arteries Animation

For a complete list of videos, visit our video library