Answer:
Total 8 electrons.
Explanation:
To draw a complete lewis structure in water molecule we will calculate the total number of valence electrons
Valence electrons:
Two hydrogen atoms: 2 valence electrons (one each)
One oxygen atom : 6 valence electrons
So total there will be 8 electrons that must be shown in the structure.
Out of these 8, four will be involved in two covalent bonds
Rest four will be in the form of two lone pair of electrons on oxygen atom.
Explanation:
Given parameters:
Wavelength of photon = 827nm = 827 x 10⁻⁹m
Unknown:
Energy of the photon = ?
Type of radiation = ?
Solution:
The energy of a photon can be derived using the expression below:
E =
h is the Planck's constant = 6.63 x 10⁻³⁴m²kg/s
c is the speed of light = 3 x 10⁸m/s
Insert the parameters and solve;
E =
E = 2.4 x 10⁻¹⁹J
Type of radiation:
Near infrared radiation
Complete Question
The complete question is shown on the first uploaded image
Answer:
The concentration of high-pressure side is
Explanation:
From the question we are told that
The thickness of the polyethylene is
The temperature is
The flux is
The concentration on the low-pressure side is
The initial diffusivity is
The activation energy for diffusion is
Generally the diffusivity of the oxygen at 600 K can be mathematically evaluated as
substituting values
Generally the flux is mathematically represented as
Where is the concentration of oxygen at the higher side
So
substituting values
