Emission spectrum results from the movement of an electron from a higher to a lower energy level. The frequency of the photon is 5.5 * 10^14 Hz.

From the formula;

E = hc/λ

h = Plank's constant = $6.6 * 10^-34$ Js

c = speed of light= $3 * 10^8$

λ = wavelength = $546.1 * 10^-9$ m

E = $6.6 * 10^-34 * 3 * 10^8/546.1 * 10^-9$

E = $3.63 * 10^-19$ J

Also;

E =hf

Where;

h = Planks's constant

f = frequency of photon

f = E/h

f = $3.63 * 10^-19 J/6.6 * 10^-34$

f = $5.5 * 10^14$ Hz

Learn more: brainly.com/question/18415575

5 0

2 years ago

According to the second law of thermodynamics, energy tends to become more spread out. True or False?

chubhunter [2.5K]

The answer is true. According to the second law of thermodynamics, energy tends to become more spread out

8 0

3 years ago

In chemistry, what varies with the number of molecules present in a sample of a particular substance?

Neko [114]

Answer: concentration

Explanation:

Concentration refers to the amount of a substance present in a sample. The more molecules of a substance present in a sample, the greater its concentration. The less molecules of a substance in a sample, the lesser the concentration. We are often concerned about analytically determining the concentration of a substance using diverse analytical methods in chemistry.

3 0

3 years ago