1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elis [28]
3 years ago
5

The amount of energy necessary to remove an electron from an atom is a quantity called the ionization energy, Ei. This energy ca

n be measured by a technique called photoelectron spectroscopy, in which light of wavelength λ is directed at an atom, causing an electron to be ejected. The kinetic energy of the ejected electron (Ek) is measured by determining its velocity, υ (Ek= mυ2/2), and Ei is then calculated using the conservation of energy principle. That is, the energy of the incident light equals Ei plus Ek. What is the ionization energy of selenium atoms in kJ/mol if light with λ = 48.2 nm produces electrons with a velocity of 2.371x106 m/s? The mass, m, of an electron is 9.109x10-31 kg. (Round to the ones place.)
Physics
1 answer:
Verizon [17]3 years ago
7 0

Answer:

The value is E_i  =  1.5596 *10^{-18} \  J

Explanation:

From the question we are told that

The wavelength is \lambda  =  48.2 nm  =  48.2  *10^{- 9 }\  m

The velocity is v = 2.371*10^6 \ m/s

The mass of electron is m_e  =  9.109*10^{-31} \  kg

Generally the energy of the incident light is mathematically represented as

E =  \frac{h *  c}{\lambda}

Here c is the speed of light with value c =  3.0 *10^{8} \  m/s

h is the Planck constant with value h = 6.62607015 *  10^{-34 }  J\cdot s

So

E =  \frac{6.62607015 *  10^{-34 }* 3.0 *10^{8}}{48.2  *10^{- 9 }}

=> E = 4.12 *10^{-18} \  J

Generally the kinetic energy is mathematically represented as

E_k  =  \frac{1}{2} *  m_e * v^2

=> E_k  =  \frac{1}{2} *  9.109*10^{-31} * (2.371*10^6 )^2

=> E_k  =  2.56 *0^{-18} \  J

Generally the ionization energy is mathematically represented as

E_i  =  4.12 *10^{-18} -   2.56 *0^{-18}

=>     E_i  =  1.5596 *10^{-18} \  J

You might be interested in
The net electric charge of an amber rod which has been rubbed with fur is called negative Group of answer choices because amber
bonufazy [111]

Answer:

The right option is option E. None of the answer choices given are totally correct.

Explanation:

All insulators normally have an equal amount of positive and negative charges distributed on their surface.

The amber rod (an insulator) is called negative because after the coming together with fur (another insulator), the amber rod rubs off electrons from the fur onto itself and has an overall more negatively charged particles than positively charged particles on its surface.

The fur in turn becomes positive because it has more positive charges than negative on its surface.

So, the convention allows the now rubbed off amber rod to be called negative.

So, it is evident that none of the answer choices are totally correct, the right answer is more of a mix of some of the answer choices and more!

Hope this helps!!

3 0
3 years ago
What is the velocity of a snail that travels 0.20 meters in 1 minute
stepladder [879]

The speed is 0.2 meter per minute.

There is not enough information given in the question to determine the velocity.

5 0
3 years ago
A car travels 1008km in 14 hours. What is the average speed of the car?
Montano1993 [528]

Answer:

72 km/hr. ...jshdhdhddjidididdiididudd

6 0
3 years ago
If a proton is released at the equator and falls toward earth under the influence of gravity, the magnetic force on the proton w
pantera1 [17]
Positive positive side naturally because protons always move to positive side and electron always move to negative side
3 0
2 years ago
Plz answer asap I need all of the answer
Ugo [173]

Answer:

Turned up side down

Explanation:

3 0
2 years ago
Other questions:
  • A runner is running to the left with a speed of 8.0\,\dfrac{\text m}{\text s}8.0 s m ​ 8, point, 0, start fraction, start text,
    11·2 answers
  • Can someone explain the law of conservation of energy?
    8·1 answer
  • A ball is dropped from rest from a height h above the ground. another ball is thrown vertically upwards from the ground at the i
    7·1 answer
  • How does weathering relate to erosion
    10·2 answers
  • 1.) Waves transfer ______ without moving ______
    8·1 answer
  • . If the centripetal and thus frictional force between the tires and the roadbed of a car moving in a circular
    5·1 answer
  • Which change would decrease the total current, I, flowing through this circuit?
    9·1 answer
  • How many meters across is a road sign that has an angular size of 120 arcseconds and is 1 km away?
    5·1 answer
  • Help me please thank you !
    9·1 answer
  • What is the energy of a photon with a frequency of 3. 6 × 1015 hz? planck’s constant is 6. 63 × 10–34 j•s.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!