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
natulia [17]
4 years ago
8

I need one last question to finish up, please help!

Chemistry
1 answer:
Jobisdone [24]4 years ago
7 0

Positron emission = emission of a positron and a neutrino when a proton is convert into a neutron. The total number of particles in the nucleus doesn't change, -1 proton +1 neutron

It's a spontaneous reaction for some nucleus.

eg:

Positron = e+

Neutrino=ve

O-15 --> N-15 + e+ +ve

Electron capture= A nucleus absorb an electron while a proton is convert in a neutron and emit a neutrino. The total number of particles in the nucleus doesn't change, -1 proton +1 neutron

eg:

Al-26 +e- --> Mg-26 + ve

Electron capture and positron emission are two mechanisms to explain the decay of some unstable isotopes. Electron capture is usually observed when the energy difference between the initial and final state is low. Mainly because of the larger amount of kinetic energy need for the expulsion of two particles with the positron emission mechanism.

You might be interested in
How many elements are in C5H4O2S
elena-s [515]

Answer:

4 elements

Explanation:

The four elements would be:

C-Carbon

H-Hydrogen

O-Oxygen

S-Sulfur

Hope this helps :)

8 0
3 years ago
How can we find the mass of a liquid only, if it is in a container? This is science but I'm not sure if I'm considering it chemi
labwork [276]
Weigh everything at once (water and container) get that number.
empty the water into a bowl or container
weigh the original container that the water was in previously
subtract  (total weight) - (container weight)
6 0
4 years ago
A sample of gas in a syringe has a volume of 9.66 mL at a pressure of
Zolol [24]
The answer is 6.58mL or 0.00658L. How I got this answer step by step is included in the photo below. Hope this helps!

6 0
4 years ago
How many molecules are there in 218.4 grams of C0CI2?
Alex Ar [27]

Answer:

10.24 ×10²³ molecules

Explanation:

Given data:

Mass of COCl₂ = 218.4 g

Number of molecules = ?

Solution:

Number of moles of COCl₂:

Number of moles = mass/molar mass

Number of moles = 218.4 g/ 129.84 g/mol

Number of moles = 1.7 mol

1 mole contain 6.022×10²³ molecules.

1.7 mol × 6.022×10²³ molecules / 1mol

10.24 ×10²³ molecules

3 0
3 years ago
Write a balanced chemical equation, including physical state symbols, for the decomposition of liquid nitroglycerin () into gase
Marat540 [252]

Answer:

4C3H5N3O9 (l)  ---------> 12CO2 (g)  +  H20 (g)  + 6N2 (g) + 6O2 (g)

Explanation:

Nitroglcerin is a drug basically used to treat chest pain. It is a dense, colourless and explo9sive liquid. Its molecular formula is C3H5N3O9.

It decomposes to gaseous dinitrogen, gaseous dioxygen, gaseous water and gaseous carbon di oxide

The equation for its decomposition is shown below;

4C3H5N3O9 (l)  ---------> 12CO2 (g)  +  H20 (g)  + 6N2 (g) + 6O2 (g)

3 0
4 years ago
Other questions:
  • the height of a column of mercury in barometer is 754.3mm. what us the atmospheric pressure in atm. in kPa.
    6·1 answer
  • What types of cells would you expect to find a lot of mitochondria
    12·1 answer
  • how much heat in joules would be required to raise the tempurture of 450g of aluminum from 19.5c to 31.2c
    11·1 answer
  • Which atoms have the highest electromagnitivity
    11·1 answer
  • When 0.1M HCl is added to the following system at equilibrium: AgCl(s) Ag+ (aq)+ Cl– (aq) the point of equilibrium will shift to
    8·1 answer
  • If a buffer solution is 0.120 M in a weak acid (Ka = 2.0 × 10-5) and 0.440 M in its conjugate base, what is the pH?
    9·1 answer
  • What happens to the composition of an atom to cause it to become positively or negatively charged?
    10·1 answer
  • It takes______ dekaliters to make 100 L.<br><br> A.1000<br> B.1<br> C.10<br> D.0.1
    13·1 answer
  • Explain why we see the pattern between predator and prey​
    11·1 answer
  • Electron dot of NH3
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!