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
nikitadnepr [17]
3 years ago
11

How much of a sample remains after three half-lives have occurred? 1/16 of the original sample 1/9 of the original sample 1/8 of

the original sample 1/3 of the original sample
Chemistry
2 answers:
Drupady [299]3 years ago
5 0
For this question, assume that you have 1 compound. This compound is divided in half once, so you are left with 0.5. That 0.5 that remains is divided in half again, this is the second half-life, and you are left with 0.25. The final half life involves dividing 0.25 in half, which means you are left with 0.125. For the answer to make sense, you need to know your conversions between decimals and fractions. To make it simple, if you have 0.125 and you times it by 8, you are left with your initial value of 1. Therefore, after three half-lives, you are left with 1/8th of the compound.
miskamm [114]3 years ago
3 0
1/8, yay math. so the third answer
You might be interested in
What is the pH value of lithium chloride?
Fiesta28 [93]

Answer:

<h2>0.0003</h2>

<h2>HERE IS YOUR ANSWER </h2>
5 0
3 years ago
How to set up the rate expressions for the following mechanism?
Anestetic [448]

Answer:

Explanation:

From the given information:

A → B k₁

B → A k₂

B + C → D k₃

The rate law = \dfrac{d[D]}{dt}=k_3[B][C] --- (1)

\dfrac{d[B]}{dt}=k[A] -k_2[B] -k_3[B][C]

Using steady-state approximation;

\dfrac{d[B]}{dt}=0

k_1[A]-k_2[B]-k_3[B][C] = 0

[B] = \dfrac{k_1[A]}{k_2+k_3[C]}

From equation (1), we have:

\mathbf{\dfrac{d[D]}{dt}= \dfrac{k_3k_1[A][C]}{k_2+k_3[C]}}

when the pressure is high;

k₂ << k₃[C]

\dfrac{d[D]}{dt} = \dfrac{k_3k_1[A][C]}{k_3[C]}= k_1A \ \  \text{first order}

k₂ >> k₃[C]

\dfrac{d[D]}{dt} = \dfrac{k_3k_1[A][C]}{k_2}= \dfrac{k_1k_3}{k_2}[A][C] \ \  \text{second order}

3 0
3 years ago
This is due in five mintues please help
Fittoniya [83]

Answer:

5

Explanation:

Na, N, O, O, O

5 0
2 years ago
The atomic number of arsenic is 33 what is the electron configuration
rjkz [21]
It is really easy if you look up an electron configuration table (one that looks like a periodic table) and then just go down the rows left to right, top to bottom, and just stop when you get to where the element is on the table.

 1s^2 2s^2 2p^{6}  3s^2 3p^6 4s^2 3d^1^0 4p^3
8 0
3 years ago
Provide 3 examples of substances that are mixtures and list the substances in them
Vedmedyk [2.9K]

Answer:

Water and salt = salt water

Oxygen and water = sea foam

Smoke and fog = smog

Explanation:

Hope this helped, nya~ :3

3 0
2 years ago
Read 2 more answers
Other questions:
  • If 0.45 mols of MnO2 can react with 0.28 moles of HCl, how many moles of Cl2 could be produced
    10·1 answer
  • If this pattern of change in the allele frequencies continued over several more generations, what might eventually happen to the
    10·1 answer
  • The unit "troy ounce" is often used for precious metals such as gold (Au) and platinum (Pt) (1 troy ounce= 31.103 g). (a) A gold
    14·1 answer
  • Can yall help on this ??? Asappp
    12·2 answers
  • What will be the the net ionic equations for the following ones:- a) AgNO3 + KCl b) Ni(NO3)2 + Na2S c) CaCl2 + Na2CO3. 2) Write
    5·1 answer
  • In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.4 from a free electron that is initially at
    13·1 answer
  • When atomic orbitals of two nuclei overlap, the mutual attraction between a negatively charged electron pair and the two positiv
    9·1 answer
  • Two different isotopes of an element have different?
    8·1 answer
  • А
    5·1 answer
  • How many non bonding electrons is in OH-
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!