A certain microwave oven delivers 1250 watts of power to a coffee cup containing 125.0 gm of water at 25.0 Celcius. If the wavelength of microwaves in the oven is 12.75 cm, how long does it take, and how many photons must be absorbed to make water boil? You may assume that all photons are absorbed and the specefic heat capacity of water is 4.184 j/gm/Celcius

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

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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: A certain shade of blue has a frequency of 7.06×1014 Hz.7.06×1014 Hz. What is the energy ?E of…

A: Frequency of Blue light = 7.06 x 1014 Hz Planck's constant (h) = 6.626 x 10-34J.s  Energy of…

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: The photoelectric work function for magnesium is 5.90 x 10-19 J. (The work is the minimum energy…

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Q: What is the energy (in J) of a photon from a microwave oven with a frequency of 6.00 MHz?

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Q: (a) Calculate the frequency (Hz) and wavelength (nm) of the emitted photon when an electron drops…

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Q: A photon has a frequency of 8.19 × 10⁸ Hz. What is the energy of this photon in Joules? (h = 6.626 ×…

A: The expression of energy of photon is shown below: where; h = Planck's constant ν = Frequency

Q: The hydrogen atom’s energy is -6.05 × 1 0 –20 J when the electron is in the n = 6 orbit and -2.18 ×…

A: Given: hydrogen atom’s energy is -6.05 × 10 –20 J when the electron is in the n = 6 orbit  hydrogen…

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

A: The given wavelength of the electron (λ) = 0.485 nm = 4.85×10-10 m The mass of an electron (m) =…

Q: Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is…

A: The heat released by a process can be calculated as given below.

Q: What is the minimum number of microwave photons with a wavelength of 3.36 mm that will have to be…

A: Calculation of heat required to heat the water:

Q: DNA is one of the most important biological molecules. It is the chemical that makes up the genetic…

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Q: In scenario A, visible light has a wavelength of 701.5 nm. Determine its frequency, energy per…

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Q: A retina of a human eye can detect light when radiant energy incident on it is at least 4.0 x 10^-17…

A: Relation between energy and wavelength:

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: What is the wavelength of microwave radiation whose frequency is 1.395 x 10 10/s?

A: Given Data:  microwave radiation Frequency = fmw=1.395 x 10 10/s?  Wavelength= ?

Q: A laser pointer is found to emit light with a wavelength of 568 nm. Determine the energy (in kJ) of…

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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 photon has a frequency of 8.83 × 10⁸ Hz. What is the energy of this photon in Joules? (h = 6.626 ×…

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Q: A local FM radio station broadcasts at an energy of 6.04×10-29 kJ/photon. Calculate the frequency…

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Q: Microwave ovens emit microwave energy with a wavelength of 12.8 cm.12.8 cm. What is the energy of…

A: Relation between energy and wavelength of a photon…

Q: A living room chandelier has ten 60 W light bulbs. How many mol of photons are emitted in 4 hours if…

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Q: A local AM radio station broadcasts at a frequency of 826 KHz. Calculate the energy of the frequency…

A: Answer:- This question is answered by using the simple concept of calculation of energy of photon…

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: What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency…

A: The frequency of the UV rays, (ν) = 1.90×1015Hz The threshold frequency of the cesium metal, (ν0) =…

Q: Assume that most of the electromagnetic energy from the sun is in the visible region near 500 nm.…

A: Calculate work function:Work function = h c / λ                       = 6.626x10-34 X 3X 108 / 500 x…

Q: It takes 146. kJ/mol to break an oxygen-oxygen single bond. Calculate the maximum wavelength of…

A: Given, Amount of energy required to break one mole of Oxygen single bond = 146. kJ/mol maximum…

Q: A local FM radio station broadcasts at a frequency of 101.4 MHz. Calculate the energy of the…

A: Photon energy is the energy carried by a single photon. The amount of energy is directly…

Q: A photon has a frequency of 8.41 × 10⁸ Hz. What is the energy of this photon in Joules? (h = 6.626 ×…

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

A: In the photoelectric effect, the threshold work function can be defined as the energy which is…

Q: The microwaves in an oven are of a specific frequency that will heat the water molecules contained…

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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: Lithium metal has a work function (p) equal to 4.64 x 10-19 J. What is the minimum frequency of…

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Q: Calculate the longest wavelength (nm) that can provide an energy of at least 449 kJ/mol.

A: The energy associated by one mole of photons is given by E = NAhcλh = Plank's constant = 6.626×10-34…

Q: A photon has a frequency of 8.39 × 10⁸ Hz. What is the energy of this photon in Joules? (h = 6.626 ×…

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Q: 4) How many photons are contained in a burst of light (536.2 nm) from a lamp that contains 606.3 kJ…

A: The energy of electromagnetic radiation is quantized. The smallest unit of energy in the radiation…

Q: Suppose an atom in an excited state can return to the ground state in two steps. It first falls to…

A: ∈=∈1 +∈2 ν =ν1 +ν2cλ=cλ1+cλ21λ1=1λ2+1λ2

Q: At high temperature hydrogen molecules split into hydrogen atoms look at picture. Consider a case…

A: N1 = 1 N2 = 2

Q: Calculate the energy of a photon of visible light with a wavelength of 706 nm. J Calculate the…

A: The energy of electromagnetic radiation is quantized. The smallest unit of energy of the radiation…

Q: A microwave oven uses electromagnetic waves at a wavelength of 2.0 x 10*¹ cm (centi-meter) to heat…

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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.