<u>Answer:</u> The longest wavelength of light is 656.5 nm
<u>Explanation:</u>
For the longest wavelength, the transition should be from n to n+1, where: n = lower energy level
To calculate the wavelength of light, we use Rydberg's Equation:
Where,
= Wavelength of radiation
= Rydberg's Constant = 
= Higher energy level = 
= Lower energy level = 2 (Balmer series)
Putting the values in above equation, we get:
Converting this into nanometers, we use the conversion factor:
So, 
Hence, the longest wavelength of light is 656.5 nm
Answer:
Answer:3.51 g
Explanation:
M(KOH)= 39.10 + 16 + 1.008 = 56.108 g/molAmount of substance is n= m/M = cV and mass m= McVolume in litres is 0.125 l
Answer:
Al (s) | Al³⁺ (aq) || Ni²⁺ (aq) | Ni (s)
Explanation:
It seems that you meant "A voltic cell".
Here, Al (s) represents the solid anode while Al³⁺ is in aqueous phase, these two forms are separated by a solid line. || is the salt bridge while Ni²⁺ is in aqueous phase and is reduced on the nickel cathode that is Ni (s).
10 elements compose the bulk of rock forming minerals
The internal energy has the symbol U. Q is positive if heat is added to the system, and negative if heat is removed;
....."W is positive if work is done by the system"........
and negative if work is done on the system.
So, work done by a system is positive.
