Answers:
a) 
b) 
c) 
Explanation:
a) The following equation states the relation between the wavelength 
and the frequency 
of the light:
(1)
Where:
is the speed of light in vacuum
is the wavelength of the light emitted by the laser pointer
is the frequency
Finding :
(2)
(3)
(4) This is the frequency
b) The energy 
of a 670 nm photon is given by:
(5)
Where:
is the Planck constant
Then:
(6)
(7) This is the energy of one photon
Now we have to find the energy of 1 mole of these 670 nm photons by multiplying (7) by the Avogadro's number (
):
(8)
This is the energy of 1 mole of 670 nm photons
c) The ground state of an atom is the point where <u>the energy of the system is zero</u>. This means the ground state energy is 
and the energy gap 
is:
Hence, the energy gap has the same value that was already calculated in part b (7), which is the energy of 670 nm photons:
This is the energy of a single 670 nm photon, which is emitted when the excited electrons return to the ground state.
That is why the wavelength (color) of the light of the laser pointer is 670 nm (red).
Answer:
heya!!!
Explanation:
In atomic physics, the Rutherford–Bohr model or Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.
Answer is: C. the concentration the products and reactants is constant.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time.
Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.
Answer:
propylcyclopentane
Explanation:
The rest Are swiggly lines and more than 5 sides
3n of force North. Since the 12 cancel the other 12 out.
