Answer:
- Option <u><em>C) The rates of the forward and reverse reactions are equal.</em></u>
Explanation:
NO₂ and N₂O₄ undergo the following <em>equilibrium</em> reaction:
That is a reversible reaction, i.e. there are two simultaneous reactions: the direct or forward reaction and the reverse reaction:
- Direct reaction: 2NO₂(g) → N₂O₄(g)
- Reverse reaction: 2NO₂(g) ← N₂O₄(g)
At the beginning, only NO₂(g) is in the sealed container. The NO₂ concentration is maximum, and the rate of the forward reaction is maximum.
As the reaction progresses, the concentration of NO₂ diminishes, and, consequently, the rate of the forward reaction decreases.
As soon as the N₂O₄ appears, the reverse reaction starts. At the beginning the rate is low, but as the N₂O₄ concentration increases the rate of the reverse reaction increases.
When both forward and reverse rates become equal the equilibrium has been reached. This is what is called a dynamical equilibrium.
Then, as per the choices, you have that, at equilibrium:
<u>A) No N₂O₄ is present</u>:
- False: as explained above, at equilibrium both NO₂ and N₂O₄ are present.
<u>B) No chemical reactions are occurring</u>.
- False: as explained above, at equilibrium both forward and reverse reaction are occurring at the same rate.
<u>C) The rates of the forward and reverse reactions are equal</u>.
- True: as explained, this is the meaning of dynamic equilibrium.
<u>D) The maximum number of molecules has been reached</u>.
- False: the number of molecules of each compound at equilibrium will be given by the constant of equiibrium, Keq = [N₂O₄] / [NO₂]², and this value varies with the temperature.
You could check if their cells had a nucleus or not. If it did it would be a eukaryote, if it did not then it would be a prokaryote.
Answer:
Speed, 
Explanation:
The device which is used to accelerate charged particles to higher energies is called a cyclotron. It is based on the principle that the particle when placed in a magnetic field will possess a magnetic force. Just because of this Lorentz force it moves in a circular path.
Let m, q and V are the mass, charge and potential difference at which the particle is accelerated.
The work done by the particles is equal to the kinetic energy stored in it such that,
v is the speed with which the particles enter the cyclotron
So,
So, the speed with which the particles enter the cyclotron is . Hence, this is the required solution.
The mass of oxygen reacted/required in this reaction is obtained as 48g.
<h3>What is stoichiometry?</h3>
The term stoichiometry has to do with mass- volume or mass - mole relationship which ultimately depends on the balanced reaction equation.
Now, we have the reaction; S + O2 ------>SO2
If 1 mole of sulfur dioxide contains 22.4 L
x moles of sulfur dioxide contains 33.6L
x = 1.5 moles of sulfur dioxide.
Since the reaction is 1:1, the number if moles of oxygen required/reacted is 1.5 moles.
Mass of oxygen required/reacted = 1.5 moles * 32 g/mol = 48g
Learn more anout stoichiometry: brainly.com/question/9743981
Answer:
"Carbon dioxide (CO2) is one of a number of gases that are transparent to the visible light falling on the Earth from the Sun, but absorb the infra-red radiation (heat) emitted by the warm surface of the Earth, preventing its loss into space. During the geological history of the Earth the level of atmospheric CO2 has varied considerably and this has had an impact on the global temperature. A significant amount of this atmospheric carbon was sequestered or (removed from the atmosphere) and turned into inert material (coal, and oil) typically 300-360 Million years ago. All of the global ecosystems and species have adapted to a lower level of atmospheric CO2 and critically, human civilisation has also grown since that period. Since the industrial revolution humans have been burning sequestered CO2 in the form of coal, oil, and natural gas which has the result of releasing energy but also releases CO2 back into the atmosphere".
