The frequency and energy of most energetic of these photons is
Hz and
J respectively.
The high energy photons will have least wavelength. Taking the given less wavelength for calculation of frequency and energy of photons.
λ = 2200 Å
Also, we know, 1 Å =
m
So, λ = 
λ =
<em> </em>m
Now, calculating frequency using the formula -
c = fλ, where c is speed of light, f is frequency and λ is wavelength.
We know, c =
m/s
f = c/λ
f = 
frequency =
Hz
Now, calculating Energy through the formula -
E = hf, where E is energy, h is planck's constant and f is frequency
Value of planck's constant =
Js
E =
*
Energy =
J
Thus, frequency and energy of photons is
Hz and
J respectively.
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<h2><em>1. A</em></h2><h2><em>3. B</em></h2><h2><em>4. C</em></h2><h2><em>7. E</em></h2><h2><em>5. F</em></h2>
Answer:
The change in entropy of gas is 
Explanation:
n= Number of moles of gas
Change in entropy of gas = 

From the given,


Let "T" be the initial temperature.






Therefore, The change in entropy of gas is 
Answer:

Explanation:
Hello,
In this case, the undergoing balanced chemical reaction is:

Thus, as 5.22 grams of aluminium oxide reacts, the required yielded amount of aluminium sulfate results:

Moreover, the percent yield is:

Best regards.