Answer:
djsjwjwjdjxjdbs djwuqidx8diw d xbd
2 N2 + 5 O2 ----> 2N2O5
Is this what you wanted?
3.25 x 10¹⁴m
Explanation:
Given parameters:
Frequency of the radiation = 9.23 x 10⁻⁷hz
Unknown:
Wavelength of the radiation = ?
Solution:
The velocity of electromagnetic radiation is the same as that of the speed of light in vacuums.
Velocity = frequency x wavelength.
Velocity = 3 x 10⁸m/s
Since the unknown is wavelength, we factor it out:
Wavelength = 
Wavelength = 

= 3.25 x 10¹⁴m
learn more:
Wavelength brainly.com/question/6352445
#learnwithBrainly
Answer:
0.01836 M
Explanation:
Again the reaction equation is;
Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s)
E°cell= 0.77 V
Ecell= 0.78 V
[Mn2+] = 0.040 M
[Fe2+] = the unknown
n=2
From Nernst's equation;
Ecell= E°cell- 0.0592/n log Q
0.78= 0.77 - 0.0592/2 log [Fe2+] /[0.040]
0.78-0.77= - 0.0592/2 log [Fe2+] /[0.040]
0.01/ -0.0296= log [Fe2+] /[0.040]
-0.3378= log [Fe2+] /[0.040]
Antilog(-0.3378) = [Fe2+] /[0.040]
0.459= [Fe2+] /[0.040]
[Fe2+] = 0.459 × 0.040
[Fe2+] = 0.01836 M