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
bezimeni [28]
3 years ago
10

Determine the identity of the daughter nuclide from the electron capture by 84be.

Chemistry
1 answer:
anyanavicka [17]3 years ago
7 0
Answer:
8  Li3

Explanation:

1) Electrons are called beta radiation (β)

2) Electrons are considered massless and with 1 negative charge, so in the nuclear reactions they are written as:
 0   e-1

Which means that they do not change the mass number of the isotope but reduces its atomic number in 1.

2) Then, the capture of one electron by berylium-8 means that it will reduce its atomic number in one unit and while its mass number will be the same.

3) The given isotope is:
 8
    Be  4


4) Then the resultant daughter will have the same mass number (8) and aomic number 3.

The element with atomic number 3 is Li, so it will be:

8  Li3


5) The total nuclear reaction is:

8               0         8
  Be + 1      e →     Li
4              -1         3

You might be interested in
How far in advance is weather forecasting most accurate
Vesnalui [34]

I'm like 99% sure its one week

8 0
3 years ago
Read 2 more answers
The activation barrier for the hydrolysis of sucrose into glucose and fructose is 108 kJ/mol. Part A If an enzyme increases the
emmasim [6.3K]

Answer:

The barrier has to be 34.23 kJ/mol lower when the sucrose is in the active site of the enzyme

Explanation:

From the given information:

The activation barrier for the hydrolysis of sucrose into glucose and fructose is 108 kJ/mol.

In this  same concentration for the glucose and fructose; the reaction rate can be calculated by the rate factor which can be illustrated from the Arrhenius equation;

Rate factor in the absence of catalyst:

k_1= A*e^{^{^{ \dfrac {- Ea_1}{RT}}

Rate factor in the presence of catalyst:

k_2= A*e^{^{^{ \dfrac {- Ea_2}{RT}}

Assuming the catalyzed reaction and the uncatalyzed reaction are  taking place at the same temperature :

Then;

the ratio of the rate factors can be expressed as:

\dfrac{k_2}{k_1}={  \dfrac {e^{ \dfrac {- Ea_2}{RT} }} { e^{ \dfrac {- Ea_1}{RT} }}

\dfrac{k_2}{k_1}={  \dfrac {e^{[  Ea_1 - Ea_2 ] }}{RT} }}

Thus;

Ea_1-Ea_2 = RT In \dfrac{k_2}{k_1}

Let say the assumed temperature = 25° C

= (25+ 273)K

= 298 K

Then ;

Ea_1-Ea_2 = 8.314 \  J/mol/K * 298 \ K *  In (10^6)

Ea_1-Ea_2 = 34228.92 \ J/mol

\mathbf{Ea_1-Ea_2 = 34.23 \ kJ/mol}

The barrier has to be 34.23 kJ/mol lower when the sucrose is in the active site of the enzyme

8 0
3 years ago
Which of the following is an example of eukaryotic cells?<br> animals<br> bacteria<br> archaea
ElenaW [278]

Answer:

Animals

Explanation:

Eukaryotic organisms are multi-celled. Animals and plants are a major example of that

8 0
2 years ago
A large sport utility vehicle has a mass of 2600 kg.
Pepsi [2]
<span>Mass of CO2 = 225.632g</span>
4 0
2 years ago
What is a mol in chemistry
Snowcat [4.5K]
Molecular weight it stands for molecular weight






6 0
3 years ago
Other questions:
  • Calculate the percent by mass of C in pentaerythritol (C(CH2OH)4)
    6·2 answers
  • What are particles of carbon otherwise known as, and what kind of pollution do they cause???
    15·2 answers
  • A covalent chemical bonds in which_____.
    15·1 answer
  • In monostremes the placenta absors oxygen and food from the mothers blood.
    14·1 answer
  • By process of incineration, a mystery substance is empirically determined to contain 40.00% carbon by weight, 6.67% hydrogen, an
    12·1 answer
  • Biologists classify all living things into __ kingdoms.<br> A.five<br> B.three<br> C.six<br> D.seven
    10·2 answers
  • Do you agree or disagree with the following statement:
    7·1 answer
  • If a reaction is exothermic, what is true of its reverse reaction?
    11·1 answer
  • Can someone answer these questions about the LACK OF CLEAN DRINKING WATER? PLS. I will give 30 pts.
    9·1 answer
  • The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal:CO(g) + H₂O(g) ⇄
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!