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
Kobotan [32]
3 years ago
10

This exercise uses the radioactive decay model.

Chemistry
1 answer:
Anna11 [10]3 years ago
3 0
For radioactive decay, we can relate current amount, initial amount, decay constant and time using:
N = No x exp(-λt)

Half-life = ln(2)/λ
λ = ln(2) / 5730
N/No = 80% = 0.8
0.8 = exp( -ln(2)/5730 x t)
t = 1844 years
You might be interested in
Determine the number of molecules in a 100. gram sample of CCl4
enyata [817]
100. g CCl4* (1 mol CCl4/ 153.8 g CCl4)* (6.02*10^23 CCl4 molecules/ 1 mol CCl4)= 3.91*10^23 CCl4 molecules.
(Note that the units cancel out so you get the answer)

Hope this helps~
8 0
3 years ago
Identify the reactants and the products of the preparation step to the urea cycle.
Salsk061 [2.6K]

According to sources, the most probable answer to this query is the enzymes and waste products that are collected by the nephron from the blood. Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
7 0
3 years ago
the atomic mass of magnesium is 24 daltons and the atomic number is 12. a. how many electrons does an electrically neutral magne
vekshin1

Atomic Mass will be 23 the new magnesium formed will be its isotope of magnesium.

We know that,

In stable condition

Number of electrons = Number of protons

Atomic number represents number of proton .

So, here number of proton is 12

Therefore, number of electron is 12

We know that -

Atomic mass = number of protons +Number of neutron

So if magnesium loses one neutron i.e. new number of neutron is 11

then its atomic mass changes.

New atomic mass will be

Atomic mass = 12 + 11

Atomic mass = 23

This new element with atomic mass 23 and atomic number 12 is the isotope of magnesium.

To know more about isotopes

brainly.com/question/11291241

#SPJ4

3 0
2 years ago
This is not a homework question
Dovator [93]
What state you live in? because I know someone who does it for free
8 0
3 years ago
Atrial natriuretic peptide is a hormone that controls blood pressure in part by increasing the urinary excretion of sodium. True
mariarad [96]

Answer:

The answer is "true"

Explanation:

ANP, or ANF, is a human peptide hormone, that controls your blood pressure, a cardiac atrium secretion hormone. It response primarily to the volume and stress expansion of the auricles and ventricles.

  • ANP's main function decreases the amount of increased extracellular fluid by increasing renal excretion.
  • This hormone is primarily developed by cardiovascular myocytes and, emanates from the wall tension locally, that's why the given statement is true.

4 0
3 years ago
Other questions:
  • Im the only noble gas with 2 electrons
    10·2 answers
  • Uranium-238 decays very slowly.its half-life is 4.47 billion years.
    7·2 answers
  • For the reaction
    13·2 answers
  • Calculate the hfg and sfg of steam at 120oC from the Clapeyron equation, and compare them to the tabulated values.
    6·1 answer
  • 1. Why has hydroelectricity's share of total U.S. electricity generation have decreased over time?
    8·2 answers
  • Wwwwwwwwwwwwwwwwwwwwwwwwwwwww
    12·1 answer
  • PLEASE HELP ME ITS DUE IN 1 HOUR PLZZZ
    7·2 answers
  • Please help fast please!!!
    12·1 answer
  • I wont graduate. Why can light be treated like a particle?​
    10·1 answer
  • Need help ASAP!!!!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!