the lifetime of the 4p1/2 state of potassium, is 27.3 ns. what are the einstein a and b coefficients for the transition?

Q: P= D„Ðx= (-in- Assume that -in- dx dx dx2 Evaluate for a particle in a box with 0 =m?v² h?n? II

A: This question comes under quantum mechanics and the topic is evaluation of average value for…

Q: The de Broglie wavelength of a particle is given by ________. a. h/mv b. hmv c. h +mv d. mv e. mv/c

A: De broglie wavelngth = h/mv  Option "a" is correct

Q: Using the equation and the value of the speed of light constant identified in the previous parts,…

A: Solution -

Q: Describe what what is meant by the term "uncertainty principle."

A: Chemistry can be defined as the branch of science that deals with composition of substances.

Q: Planck regarded his theory as applying only to material oscillators, such as those in a solid which…

A: Planck regarded his theory as applying only to material oscillators, such as those ina solid which…

Q: Calculate the energy, in kJ, for a mole of photons if 1024nm light

A: Energy of a photon is given by E = hc/λ where E = energy in J h = Planks constant = 6.626 X 10-34 Js…

Q: The reaction 9Be (3H, p) 11Be is studied by bombarding 9Be with 5 MeV tritons. Protons with energies…

A: An excited state is any state of energy higher than the ground state. Excitation energy is always…

Q: The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the…

A: Interpretation - The maximum amount (in moles) of CH3X that breaks apart is to be explained.…

Q: Which characteristic is given by the angular momentum quantum number?

A: By solving the Schrödinger equation (HΨ = EΨ), we obtain a set of mathematical equations, called…

Q: The kinetic energy of an electron is (Z + 1.5)keV. momentum of the electron.

A:

Q: D. Write down, but do not attempt to solve, the expression for the probability that an electron in a…

A: The limit will be from 2A to infinity in this case.

Q: 1. What determines the frequency and period of an oscillating mass?

A: As you didn't specify question number you need hence I'm answering first question only. If you need…

Q: Calculate and compare the energy of a photon ofwavelength 3.3 mm with that of wavelength 0.154 nm.

A: Given: Wavelength = 3.3 mm Wavelength = 0.154 nm

Q: What is the energy (in KJ) of one mole of photons associated with radiation that has a frequency of…

A:

Q: calculate the total amount of energy on units of kj for 0.380 moles of 550 nm photons

A: The energy corresponding to 'N' photons is calculated as: E =Nhcλ where N is the number of photons,…

Q: How many possible micro-states will a system with 11 argon atoms in 11 slots have?

A: Given  number of Argon atoms =11 Number of slots =11 To calculate :- Number of microstates

Q: An excited electron in an Na atom emits radiation at a wavelength 589 nm and returns to the ground…

A: inherent width in the emission line 9.20 fm

Q: Which expression represents the boundary conditions for a particle in a box with 0 <x< a? O w(0) =…

A: For 1 D box  In the boundary  x=0  and x=a

Q: Suppose that you designed a spacecraft to work by photon pressure. The sai l was a completely…

A:

Q: Positronium consists of an electron and a positron (same mass, opposite charge) orbiting round their…

A: In this activity we have positronium. It comprises an electron and one positron and they are…

Q: The energy contained in one mole of 512.5 nm photons is?

A:

Q: For a 1.0 x 10^-26 g particle in a box whose ends are at x=0 and x=2.000 Å, calculate the…

A: A particle confined 1-dimensional box is a fundamental quantum mechanical approximation explaining…

Q: What is the kinetic energy operator for Li atom? a. 0.50 +0.50₂² +0.50 3³ b. 0.50, +0.50₂ +0.503 Ⓒc…

A: In quantum chemistry, the kinetic energy operator (Kx^) of a particle along the X-axis is given by…

Q: when a sodium atom is deexcited from the first excited state to the ground state, it emits 9 Photon…

A:

Q: The width of a spectral line of wavelength 300 nm is measured as 0.01 nm. What is the average time…

A:

Q: Compare the energy output of a black-body radiator at two different wavelengths by calculating the…

A:

Q: The power of a red laser (A = 630 nm) is 4.00 watts (abbreviated W, where 1W = 1 J/s). How many…

A: The photon is composed of electromagnetic waves. They are electric fields travelling in space.…

Q: For a system of two non-interacting particles of mass 9.0 x 10-26 g and 5.0×10-26 g in a one…

A:

Q: An electron is accelerated through an electric potential toa kinetic energy of 2.15 * 10-15 J. What…

A: Using de broglie equation, we can calculate wavelength of the particle having specific kinetic…

Q: Use the de brogile relationship to determine the wavelength of an ozone (O3) molecule in the upper…

A:

Q: 421) The moment of inertia of an SF, molecule is 3.07 x 10 kg m. What is the minimum energy needed…

A: Given, the moment of inertia of an SF6 molecule = 3.07×10-45 kg m2 The minimum energy needed to…

Q: What transition in He+ has the same frequency (disregarding mass differences) as the 2p →  1 s…

A: Given, Transition in H: 2p→1s has same frequency with transition in He+ Z = 1 for H Z = 2 for He

Q: For a particle in a box of length L, write the expression for the energy levels, En, and then write…

A: Given information,    Length of box is L    The length of the box has increased to 1.1L (i.e. 10%)

Q: An electron in a hydrogen atom relaxes to n=2 and emits a frequency of 6.169 x 10^14 S^-1. Determine…

A: Given: The frequency emitted during the relaxation of the electron, (v) = 6.169×1014 s-1. The lower…

Q: Use the following equation h to calculate the momentum p, (defined as mass times velocity, m × u)…

A:

Q: 1. For a system of two non-interacting particles of mass 9.0 x10-26 g and 5.0x10-26 g in a one…

A:

Q: Calculate the total amount of energy in units of kJ for 0.345 moles of 567 nm photons.

A: Given - - &gt; Wavelength, λ = 567 nm = 5.67 x 10-7 m Number of moles, n= 0.345 mol speed, c = 3 x…

Q: 4. What is the momentum of a neutron that has a wavelength of 1.2 x 10" m?

A:

Q: Explain the origin of quantization from Max Planck and Einstein. Give necessary formulae

A:

Q: What is the threshold frequency of cesium?

A:

Q: What is the lowest possible value of the angular momentum quantum number (l) when the magnetic…

A: Value of magnetic quantum number depends on the value of azimuthal quantum number (l).

Q: What is the total energy associated with a pulse of 5.00 × 1017 photons if each photon possessed a…

A: The number of photons is = 5.00 × 1017 The frequency of the photon is = 4.79x1014 Hz

Q: Which atom is used as a reference in classifying the strength of electron-attracting and…

A: Electron attracting and withdrawing effect  involve inductive effect, mesomeric effect. These…

Q: calculate the probabilities that the electron is located at distances between 0 and 1 ?0 from the…

A: Solution -

Q: The emission spectrum of atomic deuterium shows lines at 15 238, 20 571, 23 039, and 24 380 cm−1,…

A: Using Formula RD=MDme×R RD = rydberg constant for deuterium=1.0967 x 107 m-1 Me= mass of electron =…

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.