The rays of the Sun that cause tanning and burning are in theultraviolet portion of the electromagnetic spectrum. Theserays are categorized by wavelength. So-called UV-A radiationhas wavelengths in the range of 320–380 nm, whereasUV-B radiation has wavelengths in the range of 290–320 nm.(a) Calculate the frequency of light that has a wavelength of320 nm. (b) Calculate the energy of a mole of 320-nm photons.(c) Which are more energetic, photons of UV-A radiationor photons of UV-B radiation? (d) The UV-B radiationfrom the Sun is considered a greater cause of sunburn inhumans than is UV-A radiation. Is this observation consistentwith your answer to part (c)?

Q: (a) If the kinetic energy of an electron is known to liebetween 1.59 × 10-19 J and 1.61 × 10-19 J,…

A: (a)

Q: Why is photoelectric effect important?

A: The rest-mass energy is the energy that is stored inside a stationary particle as a result of its…

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: Calculate the energy of a photon of radiation whose wavelength is 413 nm.

A: wavelength of photon = 413 nm = 413*10-9 m

Q: 35 ghz, what is the wavelength of the photons emitted, in m?

A: 1ghz = 10^9 hz We have  Velocity of light =frequency ×wavelength

Q: 6.18 What is the wavelength (in nm) of radiation that has anenergy content of 2.13 × 103 kJ/mol? In…

A: The energy 'E' of a photon is given by Planck's relation: E=hν=hcλ   (1) h = Planck's constant ν =…

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: 6.126 The sun is surrounded by a white circle of gaseousmaterial called the corona, which becomes…

A: To find: The temperature of the sun's corona

Q: What is the energy in J of 0.63 moles of photons with wavelength 741 nm.

A: Energy of each photon is given by  E = hc/λ where λ = wavelength in m  h = Plank's constant = 6.626…

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: ne longest wavelength?

A:

Q: The net change during photosynthesis involves CO2 and H2O forming glucose (C6H12O6) and O2.…

A: A balanced thermochemical equation for formation of 1.00 mol of glucose has to be given.

Q: A photon of light produced by a surgical laser has an energy of wavelength of 6.57 x 10-7 m.…

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

Q: In fireworks, the heat of the reaction of an oxidizing agent, such as KCIO4, with an organic…

A: Mass of the chloride salt=3.16 g Molar mass of chloride salt of strontium(SrCl2)=  158.53 g/mol…

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: Ultraviolet radiation (UVB) used to treat psoriasis has awavelength of 3 * 10- 7 m, whereas infrared…

A: Given the wavelength of UV radiation and infrared radiation are3×10-7 m and 1×10-5 mwe are asked…

Q: What is the energy of light with a wavelength of 5120 pm?

A: E= h C/λ GIVEN 152O pm

Q: If your favorite FM radio station broadcasts at a frequency of 104.5 MHz, what is the wavelength of…

A: The relation between wavelength and frequency is given as: cλ=ν where c is speed of light i.e.…

Q: 7. Assume a microwave oven operates at a frequency of 6.12 x 1011 s-1. a. What is the wavelength of…

A: See answers in red boxes.

Q: Which of the following is not a property or parameter of electromagnetic radiation? O Wavelength O…

A: Here option 'c' is correct option. I.e. Voltage will be correct option. It means Voltage is not a…

Q: 6.32 Careful spectral analysis shows that the familiar yellowlight of sodium lamps (such as street…

A: Given:  λ1= 589 nm= 5.890×10-7mλ2=589.6 nm=5.896×10-7m To find: The difference in the energy between…

Q: The total energy of a mole of photons of a particular type of IR light is 10.7025 kJ. What is the…

A: Energy of one photon is inversely proportional to the wavelength of the radiation. Higher the energy…

Q: If human height were quantized in 1-foot increments, whatwould happen to the height of a child as…

A:

Q: As discussed in the text, we can draw an analogy between theattraction of an electron to a nucleus…

A: Given:It is given that,"an analogy between theattraction of an electron to a nucleus and the act of…

Q: A liquid is exposed to infrared radiation with a wavelength of 5.52 × 10-4 cm. Assume that all the…

A: Given that Heat energy = 46.75 J  wavelength = 5.52 × 10–4 cm = 5.52 × 10–6 m Number of photons =…

Q: 7.78 Enormous numbers of microwave photons are needed to warm macroscopic samples of matter. A…

A: We have 252 g of water, temperature rise from 20 to 98°C, wavelength of radiation as 1.55*10-2 m ,…

Q: ssume that a microwave oven operates at a frequency of 2.40 × 10" s-1 a. What is the wavelength of…

A: Given, Frequency, v = 2.40 × 1011 s-1

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: What is the energy of one mole (in units of kJ/mol) of photons that have a wavelength of 513 nm?

A:

Q: Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to…

A:

Q: The amount energy of the given 2.36x10-21 J. What  is its wavelength

A:

Q: When the spectrum of light from the Sun is examined in highresolution in an experiment similar to…

A: The process that causes the absorption of specific wavelengths of light from the solar spectrum is…

Q: A certain microwave oven produce microwave with x wavelength at 2.50 mm, if 20.0 moles of photons…

A: Given :- no.of moles of photons = 20.0 mol  Wavelength of microwave = 2.50 mm  To calculate :-…

Q: What is the energy of a orange light that is 657nm in kJ/photon

A: We have to determine energy of a orange light that is 657nm in kJ/photon.

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: A 491 g portion of soup is heated in a microwave oven from 25.0°C to 90.0°C, using radiation with a…

A: Given, A 491 g portion of soup is heated in a microwave oven from 25.0°C to 90.0°C, using radiation…

Q: (a) The first step in ozone formation in the upper atmosphere occurs when oxygen molecules absorb UV…

A:

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

A: The energy of a photon is calculated by- The above formula is used to calculate the energy of 1…

Q: Light in the infrared portion of the electromagnetic spectrum excites vibrations of certain…

A: Given: power = 1000 mW wavelength = 808 nm volume of water = 50.0 mL initial temperature = 22.0 oC…

Q: Suppose that the microwave radiation has a wavelength of 12.4 cm . How many photons are required to…

A:

Q: A 437 g portion of soup is heated in a microwave oven from 25.0°C to 90.0°C, using radiation with a…

A: Given,  Mass of the Soup = 437g grams Initial Temperature of the Microwave Oven, Ti = 25. 0°C Final…

Q: The wavelength of a dental X-ray is 0.10 nm. What is the energy of each X-ray photon (in J) emitted…

A: Given:Wavelength = 0.10 nm = 0.10×10-9 m.

Q: What is the energy of thr green line in the sun that has a wavelength of 511.5nm?

A:

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: The energy of electromagnetic radiation is o proportional to the frequency. O All of the above. o…

A: Since the energy of radiation is given by  => E = hf where E = energy change of radiation h =…

Q: The wavelength of a beam of light is 24 mm. What is the energy of one of its photons?

A: Using wavelength of the light beam provided, the energy of its photon can be calculated.

Q: Hydra atom initially sn its around state (nei), absods a photon and ends up an etcited state where…

A: When an electron jumps from lower energy level to higher energy level it absorbs energy in the form…

Q: What is the total energy (in kJ) of 0.6207 moles of photons that have a wavelength of 626.4 nm?

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: Consider a transition in which the electron of a hydrogenatom is excited from n = 1 to n = ∞. (a)…

A: “Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

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.