How do you calculate the number of valence electrons in an atom?
1 answer:
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Answer:
19.47%
Explanation:
<em>The percentage by mass of </em><em> would be </em><em>19.47%</em><em>.</em>
The percentage by mass of a substance in solution is calculated as:
Given that the mole fraction of = 0.432
The total number of mole fraction of a solution = 1
Hence, mole fraction of water = 1 - 0.432 = 0.568
Mass of water = molar mass x mole
= 98.079 x 0.432 = 42.37 g
Mass of = molar mass x mole
= 18.02 x 0.568 = 10.24 g
Hence,
<em>%mass of</em> =
= 19.47%
Answer: In the quantum theory, the magnetic orbital momentum quantum number is most directly associated with orientation of orbitals
In the quantum theory, angular orbital momentum quantum number is most directly associated with shape of orbitals.
Explanation:
Principle Quantum Number : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
Angular orbital momentum quantum number or Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...
Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from
. When l = 2, the value of
will be -2, -1, 0, +1, +2.
Spin Quantum number : It describes the direction of electron spin. This is represented as The value of this is
for upward spin and
for downward spin.