1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Svetradugi [14.3K]
2 years ago
14

Assume you began with 10 g of a radioactive parent isotope. How many grams of parent isotope will be present in the sample after

2 half-lives?
Biology
2 answers:
Anna11 [10]2 years ago
5 0

Answer:

2.5 grams

Explanation:

In radioactive decay, one half-life is the time it takes for half of the radioactive sample to decay. So if it takes two hours (for example) for a sample to go from 8 grams to 4 grams, then one half-life has passed (since half the sample has decayed), and the half-life is two hours.

<u>Calculation:</u>

2 half-lives = sample halved twice

10 grams / 2 = 5 grams (one half-life has passed)

5 grams / 2 = 2.5 grams (two half-lives have passed)

9966 [12]2 years ago
3 0
2.5g

10÷2=5
5÷2=2.5

everytime it completes a half life, you divide the number by two
You might be interested in
Which resource is renewable? A water B coal C oil D natural gas
Anna11 [10]
A water is the correct answer
3 0
3 years ago
Read 2 more answers
(select all that apply.) the four organic molecules common to organisms are _____.
harkovskaia [24]
<span>In order to sustain life, all organisms must contain the following organic molecules; proteins, nucleic acids, carbohydrates and Lipids.</span>
6 0
3 years ago
In an effort to control vegetation overgrowth, 108 rabbits are released in an isolated area free of predators. After 2 years, it
Elis [28]

Answer:

246

Explanation:

Increased amount / current population = 972

Amount released = 108

time(t) = 2years

Using the exponential growth function :

f(t) = A*g^t

Where g = growth rate

To obtain the growth rate = g

972 = 108 * g^2

g^2 = 972 / 108

g^2 = 9

g = 3

To determine population after 9 months :

9 months to years = (9/12) = 0.75

t = 0.75

f(0.75) = 108*(3^0.75)

f(0.75) = 108 * 2.2795070

f(0.75) = 246.18676

= 246

6 0
3 years ago
Which of the following is NOT a type of Devonian arthropod?
mamaluj [8]

Answer:

D) None of the above

Explanation:

Arthropods are characterized by the possession of an exoskeleton and a segmented body. This group includes insects, arachnids, myriapods (centipedes and millipeds), and crustaceans.

The Devonian period, belonging to the Paleozoic Era, occurred from around 415 million to 350 million years ago. During this era, arthropods such as centipedes, millipedes, and flightless insects were predominant and diversified throughout this period.

Therefore, as all of these arthropods were present in the Devonian period, the correct answer is <u>d) None of the above</u>.

4 0
3 years ago
Please help me with put the examples in the right categories
artcher [175]

Answer:

Ambot nimo hahahhahahahahhahaa

6 0
3 years ago
Other questions:
  • How does a ptarmigan show protective coloration?
    10·2 answers
  • The kingdoms of eukaryotes are (blank) fungi,plantae,and aninmalia
    7·1 answer
  • At age 4, James underwent a biopsy of the right gastrocnemius muscle. The pathologist's report noted histopathologic changes sug
    12·1 answer
  • What are the four main spheres of the exterior of earth
    6·1 answer
  • Which of the following statements is false? A. Hormone receptors evolved later than many of the hormones with which they now int
    6·1 answer
  • Um I just need help ​
    7·2 answers
  • Why does an increase in<br> blood carbon dioxide<br> correlate to a decrease of<br> blood oxygen?
    15·1 answer
  • 5. Viruses are not cells, nor are they made of cells. They also cannot
    5·1 answer
  • In order to process digested nutrients and detoxify chemical agents such as drugs and alcohol, the ______ contains abundant amou
    7·1 answer
  • Based on what you learned about the roller coaster ride, which of the following statements
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!