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
artcher [175]
3 years ago
7

Can someone answer theses problems? Only do the Even number problems,Im in a rush so please help me.

Chemistry
1 answer:
8090 [49]3 years ago
7 0
The answer to the questions. All 15 of them.

You might be interested in
(The radioisotope 224Ra decays by alpha emission via two paths to the ground state of its daughter 94% probability of alpha deca
pav-90 [236]

Answer:

a) ²²⁴Ra₈₈ ---> α + ²²⁰Rn₈₆ + Q

b) the Q-value of this reaction is 5.789 MeV

c) the energies (in MeV) of the two associated alpha particles are; 5.69 MeV and 5.449 Mev

       

Explanation:

a)

The decay equation for the alpha decay is expressed as;

²²⁴Ra₈₈ ---> α + ²²⁰Rn₈₆ + Q

b)

Calculate the Q-value (in MeV) of this reaction.

Q = Mparent - Mdaughter -Mg

Q = MRa - MRn -Mg

= 224.020202 - 220.011384 - 4.00260305

= 0.00621495 amu

= 5.789 MeV

therefore the Q-value of this reaction is 5.789 MeV

c)

Energy of alpha particle is expressed as;

E∝ = MQ / ( m + M)

now this is the maximum energy available for the daughter, ²²⁰Rn going to the ground state;

The energy of the alpha particle gives;

E∝  = 220(5.789) / ( 4 + 220) = 5.69 MeV

as given in the question,The other less frequent alpha occurring 5.5% of the time leaves the daughter nucleus in an excited state of 0.241 MeV above the ground state.

Therefore the energy of this alpha is

E∝ = 5.69 - 0.241 = 5.449 Mev

Therefore the energies (in MeV) of the two associated alpha particles are; 5.69 MeV and 5.449 Mev

d)

Sketch of the nuclear decay scheme have been uploaded along side this answer.

7 0
3 years ago
Which of the following results from acid deposition? View Available Hint(s) Which of the following results from acid deposition?
ASHA 777 [7]

Answer:

Objects made of stone, like marble headstones, are worn away.

Explanation:

Acid deposition on earth is mostly as a result of acid rain. Acid rain forms which oxides of non-metals such as nitrogen and carbon dissolves in rain water to produce weak acid.

This weak acid that is produced easily wears away materials made up of marble and other sculptures. The most active of the acid is weak carbonic acid produced by dissolution of carbon dioxide in rain water.

6 0
3 years ago
What is the correct measure of density
Darya [45]
Dividing the mass by the volume.
4 0
3 years ago
Read 2 more answers
When matter is heated, particles within the matter will.
alexandr1967 [171]
The answer is A, when these particles are heated they tend to speed up.
7 0
3 years ago
Read 2 more answers
As a substance changes fees from gas to liquid to solid :
Korolek [52]

I would say that the density increases because the distance between the molecules decreases, and therefore becomes smaller, and vice versa the density increases, and that is a physical change not a chemical change.

3 0
3 years ago
Read 2 more answers
Other questions:
  • How many days the average menstrual cycle lastas
    12·1 answer
  • A theory is a ____.
    12·1 answer
  • If an element has 12 protons and 17 neutrons, how many electrons must it have?
    5·2 answers
  • A student observes what happens when two different aqueous solutions are mixed in a test tube. Which of the following observatio
    13·1 answer
  • If ice is warmed and becomes a liquid, which type of process is it ?
    10·2 answers
  • What is the formula for tricarbon heptafluoride?<br> C2F3<br> CF7<br> C3F7<br> C773
    11·1 answer
  • HELPWITH THE QUESTIONS ALL OF THEM PLZZZZZ ASAPPPP
    13·1 answer
  • HELPPPPP ASAP PLEASEEE
    8·2 answers
  • Did you cook the food yourself ?into passive<br>​
    8·1 answer
  • Which reverses the flow of current through an electric motor?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!