A ground-state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate energy level, and a second to return to the ground state. (a) What higher level did the electron reach? (b) What intermediate level did the electron reach? (c) What was the wavelength of the second photon emitted?

Q: The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are…

A: The minimum number of photons that must strike the receptor has to be calculated

Q: One of the radiographic devices used in a dentist's office emits an X-ray of wavelength 2.090 ×…

A: The frequency (v) of the given x-ray is calculated using equation (1) in which c is the speed of…

Q: A stellar object is emitting radiation at 3.55 mm. (a) Whattype of electromagnetic spectrum is this…

A: a) 3. 55 mm= 3.55 x 10-3 m. So, the radiation is microwave.

Q: Calculate the frequency of a photon with a wavelength of 343.5nm?

A:

Q: An electron in the n=5 level of an H atom emits a photon ofwavelength 1281 nm. To what energy level…

A: Given information: Wavelength = 1281. nm Initial state of an electron = 5   Rydberg’s equation is…

Q: A He+ ion absorbed a photon with a frequency of 1.23*10^16 Hz to reach an energy level with n=4.…

A: The helium ion (He+ ) is a hydrogen-like species as it has only one electron in its 1s orbital. The…

Q: An excited hydrogen atom emits a photon with a wavelength of 434.1 nm. What is the frequency of this…

A: Given,Wavelength = 434.1 nm

Q: The microwaves used to heat food have a wavelength of 0.125 m. What is theenergy of one photon of…

A: Given: The wavelength of microwaves=0.125 m The expression used to calculate the energy of  one…

Q: Determine the energy of a photon with a wavelength of 404 nm.

A: Energy of a Photon is 4.92x10-19J

Q: the wavelength of a neutron moving at 1775 m/s?

A: The required solution is as follows:

Q: The retina of a human eye can detect light when radiant energy incident on it is at least 4.25  ×…

A: Given data: Radiant energy incident on human eye = 4.25 ×10−17 J Wavelength correspondence is given…

Q: How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 655 nm, contain?

A: The relation between energy and no. of photons asgiven byEnergy E=NA*hνE=NA*h*cλν=frequency of…

Q: The red lasers used to read the barcodes of products at the grocery stores produce light with a…

A: Energy of a photon E = hcλ where, h = plank's constant = 6.63×10-34kg m2s c = speed of light =…

Q: A yellow-green line occurs at 533.8 nm in the emission spectrum of iodine. What amount of energy, in…

A: Given Wavelength  = 533.8 nm                       = 533.8 × 10-9 meter           ( 1 nm = 10-9…

Q: (a) A laser emits light that has a frequency of 4.69 * 1014 s - 1.What is the energy of one photon…

A: Laser is also known as ‘light amplification by stimulated emission of radiation. ’It is a process in…

Q: What is the energy of one photon of light which has a frequency of 4.69*1014 s-1?

A: Energy of one photon of light can be determined using Planck’s equation as follows,

Q: What is the energy in kJ of a mole of photons associated with red light of wavelength 7.00 × 102 nm?

A: The energy of any photon is related to wavelength as, => E = hcλ where E = energy of each photon…

Q: What is the energy of a mole of X-ray photons that has a wavelength of 6.17 x 10-7 m?

A:

Q: If an atom of neon-20 were moving at its root mean square velocity at 255°C, what would the de…

A: Root mean square velocity=3RTMGwhere ,         R=Universal gas constant         T=Temperature in…

Q: What is the energy of a photon that has a wavelength of 488.7 nm?

A:

Q: What is the wavelength in meters of the photon emitted when this highly excited hydrogen atom of…

A: The Rydberg formula is a mathematical formula which is used for the prediction of the wavelength of…

Q: What is the energy in joules of a photon with a wavelength of 610 nm?

A:

Q: If the frequency of a photon is 4.17x10^14 Hz, what id the energy in kJ/mol of 1 mol of these…

A: We know that , energy of a photon is related to Plank's constant as,…

Q: A stellar object is emitting radiation at 3.55 mm. (a) Whattype of electromagnetic spectrum is this…

A: (a) 3.55 mm= 3.55 x 10(to the power of-3)m. So, the radiation is microwave.

Q: A beam produces light at 5.27 * 10^-7 meters. How many photons of light from this beam would be…

A:

Q: A hydrogen atom in the ground state absorbs a photon of wavelength 95.0 nm. What energy level does…

A: The Rydberg equation is given below.

Q: Calculate energy of a photon having the frequency of 1.68 x1015 1/s

A:

Q: The mass of a golf ball is 45.9 g . If it leaves the tee with a speed of 73.0 m/s , what is its…

A: De Broglie equation provides the relationship between wavelength of a particles and its mass which…

Q: What is the wavelength (in meters) of radiation whose energy is 3.40 x 1019    Joules/sec?

A: The relation between energy and wavelength of a radiation is given by Plank-Einstein’s relation,…

Q: If a mole photons of light has 2.39 J mol^-1 energy, what is its wavelength and description?

A: Given that : Energy of the photon = 2.39 J/mol Thus, for 1 mole, Energy=2.39 Jmol×1 mol=2.39 J

Q: A certain microwave oven delivers 750 watts (Js) of power to a coffee cup containng 54,7 g of water…

A: Mass of water = 54.7 g  Initial temperature of water Ti = 23.9 °C  Final temperature of water Tf =…

Q: What is the frequency for a photon with wavelength 9.14 km

A: Given values-> Wavelength = 9.14km

Q: What is the energy, in J, of a photon with a frequency of 4.88XE3 s1?

A: Frequency , v = 4.88 x 103 S-1 We know E = hv;          h = planks constant

Q: An F-15 Strike Eagle weighs in at roughly 32,000 kg fully loaded. If an F-15 Eagle is traveling at…

A: Given: weight= 32000 kg  It travels with 3017 km/hour.  To find: Debroglie wavelength associated…

Q: This excited atom then emits a photon of wavelength 434.1 nm. What energy level does the electron…

A: Given,434.1 nm.

Q: A molecule emits a photon with 6.347x10–19 J of energy. What is the wavelength, in nanometers, does…

A: Given:Energy of photon  =6.347 x 10-19 JTo find: Wavelength of photon, λ = ?also we know,speed of…

Q: What is the energy (in joules) of a photon of green light having a wavelength of 440 nm?

A:

Q: A photon of ultraviolet light possesses enough energy to mutate to a single strand of human DNA.…

A: Given, wavelenght of uv light λ=250 nm =250×10-9 mspeed of light =3.0×108 m/secplanck constant…

Q: Place the following transitions of the hydrogen atom in orderfrom shortest to longest wavelength of…

A: The given question can be solved on the basis of the prior knowledge of the Rydberg equation which…

Q: A 327 g portion of soup is heated in a microwave oven from 25.0°C to 90.0°C, using radiation with a…

A: Energy absorbed by the soup, E=mC∆T Energy of a photon, E'=hcλ

Q: What is the frequency of a photon of light with an energy of 0.000557 J?

A: The relationship between energy and frequency is given by Plank- Einstein relation. Here, E is the…

Q: How much energy is contained in 1 mol of each of the following? - γ-ray photons with a wavelength of…

A: It is given that:The wavelength of γ-rays is 2.38×10-5 cm

Q: A photon has a frequency of 7.4 × 10° Hz. What is the energy of this photon?

A: Given information,      Frequency of photon 7.4*108 Hz or 7.4*108 s-1.

Q: Calculate the energy of one photon of yellow light that has a wavelength of 589 nm?

A: The energy of a photon can be calculated by using the formula.

Q: Estimate the de Broglie wavelength of an alpha particle that has a kinetic energy of 1.47 keV. ___m

A: The de Broglie wavelength is given by  where h = Plank's constant = 6.626 X 10-34 Js p = momentum…

Q: What is the energy in kJ of a mole of photons with a wavelength of 440 nm?

A: According to data given in the question,Wavelength of photon = 440 nmIt is known that, 1 nm = 10-9…

Q: What is the energy of a mole of photons that have a wavelength of 755 nm?

A: Given that: wavelength = 755 nm = 755 x10−9 m To find, the energy of a mole of photons that have a…

Q: Classify each of the following statements as either true orfalse: (a) A hydrogen atom in the n = 3…

A: (a) The statement is given that when n=3 it emits light at only two specific wavelengths because the…

Q: Radiation in the ultraviolet region of the electromagnetic spectrum is quite energetic. It is this…

A:

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.