The electron microscope uses the wave property of electrons to observe very small objects. A moving electron has a wavelength described by the de Broglie equation. What would be the kinetic energy, in J, of an electron with a wavelength of 0.485 nm, which would be equivalent to the wavelength of electromagnetic radiation in the X-ray region? (The mass of an electron is 9.11 × 1028 g.)

Q: Calculate the wavelength of light that has a frequency of 3.09 × 1014 s−1.

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Q: Electron microscopes operate on the fact that electrons act as waves. A typical electron kinetic…

A: Applying de-Brogalie equation ∆E= hc/lemda     = 1242 /lemda  When energy is in the eV .

Q: In Einstein's photoelectric experiment, the kinetic energy of an electron displaced from a metal by…

A: the kinetic energy (in J) of the electron is 2.83 x10-18 JExplanation:If you have any questions…

Q: 65. What is the de Broglie wavelength (in nm) associated with a 2.50−g Ping-Pong ball traveling at…

A: Given-> Mass (m)= 2.50 gm = 0.00250 kg (1Kg= 1000gm) Velocity (v) = 15.3 m/h = 15.3/3600 m/s…

Q: The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: R E=- In…

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Q: function represents the minimum amount of energy to observe ejected electrons via the photoelectric…

A: Given,  Titanium has a work function = 6.94 x 10-19 J. The maximum kinetic energy of ejected…

Q: In Einstein's photoelectric experiment, the kinetic energy of an electron displaced from a metal by…

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Q: Current theories of atomic structure suggest that all matter and all energy demonstrate both…

A: Here, we have to calculate the de Broglie wavelength for: a. an electron moving at 0.91 times the…

Q: Some chemical reactions, such as formation of ozone in Earth's stratosphere, can be initiated by…

A: The relationship between wavelength and energy is given by  E = hc / λ where E = energy of photon in…

Q: Calculate the wavelength of light that has a frequency of 7.99×1014s−1.

A: Frequency = c/wavelength c = speed of light = 3 x 108 m/sec 1 m = 109 nm

Q: In Einstein's photoelectric experiment, the kinetic energy of an electron displaced from a metal by…

A:

Q: Consider the following electromagnetic wave. It takes 1 s for the wave to propagate (travel) from…

A: Given: wavelength = 1.6x10-3 m

Q: The fastest golf drive ever recorded is 97.05 m/s (217.1 mph) and was achieved by Ryan Winther at…

A: the distance between two  consecutive  crest or two consecutive trough is known as Wavelength.

Q: Calculate the de Broglie wavelength of a 143 g baseball travelling at 42 m s−1. Why is the wave…

A: Wavelength can be calculated using the given equation: λ  =  hmvh isthe Plancks constantm is the…

Q: Calculate wavelength and frequency of waves.   (a) A local radio station broadcasts at a…

A: The objective of the question is to calculate the wavelength and frequency of waves. In part (a), we…

Q: The electron microscope uses the wave property of electrons to observe very small objects. A moving…

A: Given, mass of electron, m = 9.11*10-28 g x 1 Kg1000 g =  9.11*10-31 KgKinetic energy of electron, K…

Q: When we model light (EM radiation) as a particle, we call it a photon -- a packet of energy. How…

A: The concept used in this question is taken from general chemistry.  According to question Light has…

Q: Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm)…

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Q: An electromagnetic radiation is fired at a hydrogen atom causing electron excitation from n = 1 to n…

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Q: The electron microscope uses the wave property of electrons to observe very small objects. A moving…

A: Kinetic energy = h22λ2m where wavelength = λ  mass of electron = m Plank's constant = h

Q: a metal has a minimum energy threshold of 266 kJ/mol, what happens if light at a wavelength of 400.0…

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Q: Red lights has a wavelength of about 6.8 x 102 nm. What

A: ν = C/λ ----(1) Where  ν = frequency of light = ?  C = light velocity = 3 x 108 m /s  λ = wavelenght…

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Q: The work function (binding energy) is the energy that must be supplied to cause the release of an…

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A: The energy difference for the transition of an electron from different energy state of an hydrogen…

Q: 2. Determine the energy (in Joules) of light with a frequency of 4.5 x 1010 Hertz. What region of…

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Q: 5. The minimum energy needed to break an oxygen-oxygen bond in ozone is 387 kJ/mol. Does a photon…

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Q: Three of the known wavelengths of the emission spectrum for helium are 402.6 nm, 447.1 nm, and 587.5…

A: The spectra are broadly classified into two types, one is emission spectra and the other is…

Q: E4   =   −1.0 × 10−19  J   E3   =   −5.0 ×10−19  J   E2   =   −1.0 × 10−18  J   E1   =   −1.5 ×…

A: Wavelength is related to energy by the following formula : E  = h.Cλwhere λ = wave lengthE = energyh…

Q: Green light has a wavelength of approximately 5.00 x 102 nm. What is the frequency? Calculate the…

A: CALCULATION Wavelength = 5.00×102 nm= 5.0×10-7 m Speed of light = 3.0×108 m/s Frequency = 3.0×108…

Q: A hydrogen atom absorbs energy and an electron is excited to the n = 2 shell. When the electron…

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Q: The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: E=−Ry/n2…

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Q: Thomson also experimented with shining ultraviolet light at metal electrodes, such as zinc, to…

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Q: An excited ion emits radiation at a wavelength of 431.9 nm in the visible range of the spectrum.…

A: The relation between wavelength, frequency and speed of light can be expressed as follows-

Q: The electron microscope uses the wave property of electrons to observe very small objects. A moving…

A:

Q: The work function (ϕ) for the a metal is 7.00 x 10 -19 J. What is the longest wavelength of…

A: Given, work function (ϕ) for metal is 7.00 x 10 -19 J.

Q: The scattering of sunlight by the mixture of gas molecules in air results in the blue color of the…

A: Given  Frequency = 6.20 × 1014 Hz  Hz is also written as second-1 Frequency = 6.20 × 1014 sec-1…

Q: When a hydrogen atom absorbs a photon of electromagnetic radiation (EMR), the internal energy of the…

A: The energy required to ionize a ground state hydrogen atom is calculated as follows,

Q: electron moves with a speed of 7.5 x 105 m/s. What is the de Broglie wavelength in nanometres?

A: Given,  Velocity (v) = 7.5 ×105 m/s Mass of electron = 9.1 ×10-31 kg De-broglie wavelength (L) =…

Q: Calculate the wavelength of the line in the emission line spectrum of hydrogen caused by the…

A: The Rydberg's equation for the calculation of  the wavelength during electron transition  => 1 /…

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.