FINAL EXAM CHM 151 RIO SOLADO M.SCHAAB Q&A Guaranteed Success
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Course
CHM
Institution
CHM
peed of light - waves can travel through a vacuum at a constant
speed of 2.998 ××
10^8 m/s, (denoted by c).
amplitude - extent of the displacement caused by a wave (for sinusoidal
waves, it is one-half the difference from the peak height to the trough
depth, and the intensity is proportional...
The spectrum consists of colored lines, at least one of which (probably the
brightest) is red. - ✔✔The light produced by a red neon sign is due to the
emission of light by excited neon atoms. Qualitatively describe the
spectrum produced by passing light from a neon lamp through a prism.
c = λν - ✔✔speed of light = wavelength x frequency
E = hv - ✔✔E is energy of a photon
h is planks constant = 6.626 × 10^−34 J s
v is frequency (s^-1 or Hz)
, FM-95, an FM radio station, broadcasts at a frequency of 9.51 × 10^7 s−1
(95.1 MHz). What is the wavelength of these radio waves in meters? -
✔✔3.00 x 10^8 m/s = λ(9.51 x 10^7 m -1)
λ = 3.00 x 10^8 m/s / 9.51 x 10^7 m -1
λ = 3.15 meters
Light with a wavelength of 614.5 nm looks orange. What is the energy, in
joules, per photon of this orange light? What is the energy in eV (1 eV =
1.602 × 10^−19 J)? - ✔✔Using a combo of C=λv and E=hv
3.00 x 10^8 m/s = 6.145 x 10^-7m/s (h)
3.00 x 10^8 m/s / 6.145 x 10^-7 = 4.9 x 10^14 s -1
Planks constant (6.63 x 10^-34)x (4.9 x 10^14) = 3.24 x 10^-19 Joules or
2.018 eV
Bohr's model of the hydrogen atom - ✔✔structural model in which an
electron moves around the nucleus only in circular orbits, each with a
specific allowed radius; the orbiting electron does not normally emit
electromagnetic radiation, but does so when changing from one orbit to
another.
excited state - ✔✔state having an energy greater than the ground-state
energy
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