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Chemistry, 11.09.2019 08:10 edith47

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1.) a particular microwave photon has a wavelength of 0.01 m, a photon of green visible light has a wavelength of 520 nm and a photon of gamma radiation has a wavelength of 8 pm. rank these forms of electromagnetic radiation in order of increasing energy and frequency.
frequency (ν):
energy (e):
what general trend do we see?
hint: ▲
do not do a calculation. what is the relationship between frequency and wavelength? between energy and wavelength?
2.) what is the wavelength of one ultraviolet (uv) photon if the frequency is 1.50 × 1015 s−1?
what is the energy of one uv photon of this frequency?
what is the energy of one mole of uv photons of the same wavelength?
hint: ▲
what is the relationship between frequency of light and its wavelength? what is the relationship between the energy of a photon and its wavelength?
3.) an argon laser gives off pulses of green light (wavelength = 514 nm). if a single pulse from the laser has a total energy of 10.0 mj how many photons are in the pulse?
hint: ▲
what is the energy of a single photon of this green light? what is the energy of more than one photon?
4.) several everyday objects are listed below. how does white light interact with each of these? is it transmitted, reflected, absorbed or emitted? explain how you know.
a light bulb that is on
a gallon of milk
a glass of water
5.) green light of wavelength 516 nm is absorbed by an atomic gas.
what is the energy difference between the two quantum states involved in the transition?
if the gas absorbed a mole of photons, what is the total energy that would be absorbed?
6.) in the bohr model for the hydrogen atom, in which orbit does an electron have higher overall energy:
n = 1 or n = 5?
hint: ▲
the phrase "quantum state" is another way to say energy level.
what is the relationship needed to find the energy of a single photon? how many photons are in a mole of photons?

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