Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 295 mL of coffee from 25.0 °C to 62.0 °C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 J/(g - K), as water over this temperature range. Express the number of photons numerically. View Available Hint(s) ΑΣφ photons

Q: The metal, when a metal was exposed to light at a frequency of 7.08 x 1015 51, electrons were…

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

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Q: How many photons with a wavelength of 877 nm are needed to melt 473 g of ice? The enthalpy of fusion…

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Q: True or false? For the hydrogen atom, (a) the allowed energy levels are E = (13.60 eV)/n2 and E …

A: We know energy in nth orbital is given as :  En=-Z2n213.6 eVwhere,n=0,1,2..Z= atomic number.

Q: A metal alloy of unknown composition was bombarded with 204 nm photons to determine its…

A: Given,  Wavelength of photon= 204 nm Velocity of electrons ejected= v= 6.70*105 m/s Mass of…

Q: Consider the electron of a Li²+ ion that undergoes a transition from a higher energy state n to its…

A: Given ,  ν0=5.464×1014 s-1

Q: A 359 g portion of soup is heated in a microwave oven from 25.0 °C to 90.0 °C, using radiation with…

A: Given, the mass of the soup, Msoup = 359 g Initial temperature of the Microwave Oven, ti = 25.…

Q: Consider an electron in a nanowire (approximated by a one-adimensional box) that goes from the state…

A: The energy equation for electron present in nanowire is as follows,

Q: An ampule of napthalene in hexane contains 5.00x10^-4 mol napthalene. The napthalene is excited with…

A: Given: 5.00 × 10-4 mol naphthalene in an ampule wavelength = 349 nm Energy emitted = 15.5 J…

Q: 1a) What is the wavelength of a photon of light (in nm) whose frequency is 3.74 x 10^14Hz? 1b)…

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

A: The energy required is given by, E=m.C.∆T where m is the mass, C is the specific heat and ∆T is the…

Q: What is the frequency of the photons emitted by hydrogen atoms when they undergo transitions from n…

A: Given that,  The photons emitted by hydrogen atoms undergoes transitions from energy levels n1 = 5…

Q: What is the frequency of a photon that is absorbed when a hydrogen atom undergoes a transition from…

A: Rydberg formula: The wavenumber for the transition in the hydrogen atom can be calculated from the…

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

A: Concept based on the calculation of energy of a single photon of blue light with a given frequency.…

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: power output of a laser is measured by its wattage, the number of joules of energy it radiates per…

A: a. Given, wavelength = 476.2nm Energy of a photon is given by The energy carried by each photon is…

Q: Photons of infrared radiation are responsible for much of the warmth we feel when holding our hands…

A: Mass of water = 175 g Initial temp of water = 25°C Final temp = 40°C Wavelength = 1.5 × 10-6 m No of…

Q: A 8.00 mL ampule of a 0.150 M solution of naphthalene in hexane is excited with a flash of light.…

A: we have to calculate the percentage of naphthalene molecules that emit photon

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

A:

Q: An AM radio station broadcasts at 1030 kHzkHz , and its FM partner broadcasts at 98.3 MHzMHz .…

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Q: A local AM radio station broadcasts 4.87 × 10-³1 kJ/photon. (1 KHz Calculate the frequency at which…

A: energy of photon is directly proportional to its frequency. If energy is denoted by E and frequency…

Q: Suppose that you have a solution containing a substance whose molecules have two quantum states…

A: The population at high energy state is given by:        N = N0 e-ΔE/KT The percentage of molecules…

Q: A 545 g portion of soup is heated in a microwave oven from 25.0 °C to 90.0 °C, using radiation with…

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

Q: A liquid is exposed to infrared radiation with a wavelength of 2.74 x 104 cm. Assume that all the…

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Q: Consider x-ray radiation with a frequency of 4.09  1016 Hz. How many photons are contained in a…

A: The relation between energy and frequency is given by

Q: Water is exposed to infrared radiation of wavelength 2.8×10−4 cm . Assume that all the radiation is…

A: Given data, wavelength (λ)=2.8×10-4cmMass of water=2.1g∆T=2.3KCwater=4.184J/g.K

Q: An ampule of naphthalene in hexane contains 1.00×10-4 naphthalene. The naphthalene is excited with a…

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Q: Calculate the energy of one photon with a frequency of 5.09 x1014 s-1. What is the energy of a mole…

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Q: A 5.00-mL ampule of a 0.100-M solution of naphthalene in hexane is excited with a flash of light.…

A: Molarity - ratio of number of moles of solute to the volume of solution in litres. Formula is,…

Q: The retina of a human eye can detect light when radiant energy incident on it is at least 4.0 ×…

A: Given:Light energy detectable = 4.0 × 10-17 J.Wavelength of photons = 485 nmWe need to find the…

Q: In his explanation of the threshold frequency in the photoelectric effect, Einstein reasoned that…

A: From the concept of threshold frequency and wavelength and work function we get the answer

Q: (b) A Blu-ray laser has a power of 5 milliwatts (1 watt = 1 J s−1). How many photons of light are…

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Q: Given the relationship between wavelength, frequency and the speed of light, calculate the frequncy…

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Q: A certain microwave oven delivers 1250 watts of power to a coffee cup containing 125.0 gm of water…

A: Given: Power of microwave oven= 1250watts Mass of water= 125.0 g The wavelength of the microwave =…

Q: 2) Based on your knowledge of the Electromagnetic Spectrum, what are the differences between…

A: Electrons can behave as a particle as well as wave. The dual nature of electron was explained by De…

Q: A metal alloy of unknown composition was bombarded with 204 nm photons to determine its…

A: Given information: Wavelength = 204 nm Velocity of electrons = 6.70×105 m/s

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

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Q: What is the energy of a photon of frequency 4.8 × 1014 Hz

A: Energy can be calculated from frequency using the relation :  E = hv  h = Plank's constant  v =…

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.