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Sindrei [870]
3 years ago
7

An electron in the n=6 level of the hydrogen atom relaxes to a lower energy level, emitting light of ?=93.8nm. find the principa

l level to which the electron relaxed.
Chemistry
2 answers:
Rufina [12.5K]3 years ago
6 0

The electron in the hydrogen atom relaxes to \boxed{\text{first}} principal level.

Further Explanation:

Electronic transition is the process of transference of electrons from one energy level to another energy level. If electron jumps from higher to lower level, it is accomplished by release of energy. This process is called emission process. Similarly, electron gains energy while going from lower to higher energy levels. This process is known as absorption process.

The expression to calculate wavelength of transition in hydrogen atom is as follows:

\dfrac{1}{\lambda}=R_\text{H}\left(\dfrac{1}{\text{n}_1^2}-\dfrac{1}{{\text{n}_2^2}}\right)                                                            ...... (1)                                        

Where,

\lambda  is the wavelength of transition.

R_\text{H} is Rydberg constant.

\text{n}_2 is the initial energy level of transition.

\text{n}_1 is the final energy level of transition.

Rearrange equation (1) to calculate \text{n}_1.

\dfrac{1}{\text{n}_2}=\sqrt{\dfrac{1}{\text{n}_1^2}-\dfrac{1}{\lambda R}_\text{H} }                                                  ...... (2)

Substitute 6 for \text{n}_1, 93.8 nm for \lambda and 1.0974\times10^7\text{ m}^{-1} for R_\text{H} in equation (2).

\begin{aligned}\dfrac{1}{\text{n}_2}&=\sqrt{\dfrac{1}{\text{6}^2}-\dfrac{1}{(93.8\text{ nm})\left(\dfrac{10^{-9}\text{ m}}{1\text{ nm}}\right)(1.0974\times10^7\text{ m}^{-1})}\\&=0.999\\&\approx{1}\end{aligned}                                              

Solving for \text{n}_2,

\text{n}_2=1

Therefore electron present in sixth energy level relaxes to first energy level.

Learn more:

1. Which transition is associated with the greatest energy change? brainly.com/question/1594022

2. Describe the spectrum of elemental hydrogen gas: brainly.com/question/6255073

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: electronic transition, emission, absorption, lower, higher, energy level, electrons, wavelength, Rydberg constant, initial energy level, final energy level, sixth, first, n1, n2, 0.999, 1, wavelength of transition, hydrogen atom, higher, lower.

Rama09 [41]3 years ago
3 0

We can find the principal level or lower level using Rydberg's formula:

1/w = R(1/L² - 1/U²) 

<span>where:</span>

<span>w is the wavelength (93.8 nm),</span>

L is the lower energy level (unknown)

U the upper energy level (n= 6)

R is Rydberg's constant (10,967,758 waves per meter)

Substituing known values into the equation:<span>
1/(9.38 * 10^-8 m.) = 10,967,758(1/L² - 1-36) </span>

Using the solver function of the calculator to get for L:

L = 0.999 <span>
so L = 1. 
<span>The lower level is 1 (the ground state).</span></span>

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a. mass of iron = 69.92 g

b. percent yield = 93%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

a.

Reaction

Fe₂O₃+3CO⇒2Fe+3CO₂

MW Fe₂O₃ :  159.69 g/mol

mol Fe₂O₃

\tt \dfrac{100}{159,69}=0.626

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mol Fe :

\tt \dfrac{2}{1}\times 0.626=1.252

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b.

actual yield = 65 g

theoretical yield = 69.92 g

percent yield :

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