Difference between fission and fusion?
1 answer:
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Explanation:
It is known that each metal has a different work function and it is just the energy required to remove the electron from the surface.
The relation between energy and work function is as follows.
where, = energy of photon
Q = work function
K.E = kinetic energy of electron
When the value of Q is large then the amount of energy required by the photon is also large and vice-versa.
And, when there is not sufficient energy to remove an electron from metal surface or energy is less than its work function then electron will not be removed.
On the other hand, when incoming photon will have enough energy then electron will be ejected.
In the given situation, light from laser A is not able to remove the electron from metal surface which means that energy of photon is less than work function Q.
As, both B and C are able to remove electron from the surface of metal. So, after the removal of electrons rest of the energy of photons is transferred to eject electrons and this energy is converted into kinetic energy.
As energy of B is greater than the energy of C and A has the lowest energy among all.
Therefore, order of energy from lowest to highest is as follows.
A < C < B
Now, the relation between energy and wavelength is as follows.
E =
where, = wavelength
So, energy is inversely proportional to wavelength. Therefore, increase in energy means decrease in wavelength.
Therefore, increasing order of wavelength is as follows.
B < C < A
<u>Answer:</u> NO is the limiting reagent in the given reaction and 0.857 moles of will be produced.
<u>Explanation:</u>
Limiting reagent is defined as the reagent which is present in less amount and it limits the formation of products.
Excess reagent is defined as the reagent which is present in large amount.
For the given chemical reaction:
We are given:
Moles of NO = 0.857 mol
Moles of oxygen = 0.498 mol
By stoichiometry of the reaction:
If 2 moles of NO reacts with 1 mole of oxygen gas.
So, 0.857 moles of NO will react with = of
As, the given amount of oxygen gas is more than the required amount. So, it is considered as an excess reagent.
Thus, NO is considered as the limiting reagent because it limits the formation of products.
By Stoichiometry of the reaction:
If 2 moles of NO produces 2 moles of nitrogen dioxide gas.
So, 0.857 moles of NO will produce = of
Hence, NO is the limiting reagent in the given reaction and 0.857 moles of will be produced.