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JulijaS [17]
3 years ago
10

The warming of the thermosphere (the upper level of the atmosphere) is caused by the photo absorption of high energy photons. On

e of the processes that occurs in the thermosphere is the photo ionization of N2(g). N2(g) + hν → N2+(g) + e− What is the maximum wavelength of a photon needed to ionize N2 if the ionization energy of N2 is 1495 kJ/mol? In what region of the electromagnetic spectrum does a photon of this energy belong?
Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

Wavelength of photon is 80.1 nm and it belongs to UV region.

Explanation:

If wavelength of required photon is \lambda then-

                                 N_{A}\frac{hc}{\lambda }=1495kJ

where, N_{A} is avogadro constant, h is plank constant, c is velocity of light.

So, (6.023\times 10^{23})\times \frac{6.626\times 10^{-34}J.s\times 3\times 10^{8}m.s^{-1}}{\lambda }=1495\times 10^{3}J

or, \lambda = 8.01\times 10^{-8}m

or, \lambda = 80.1 nm

As wavelength of photon lies between 1-100 nm therefore the photon belongs to UV region of electromagnetic spectrum.

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The atoms and molecules in a gas are in constant motion. Temperature is a measure of this motion. How are these related? As temp
Sedaia [141]

Here we have to choose the correct statement on the effect of temperature on the motion of the molecules and atoms of a gas.

As the temperature increases the molecules and atoms move faster.

As per the kinetic theory of gas molecules and atoms the kinetic energy (K.E.) of the atom or molecules is related to temperature by the equation

K.E. = \frac{3}{2}kT ( k = Boltzmann constant, T = temperature.

Thus as the temperature increases the K.E. increases thus the atom or molecules move faster.

With the decrease of temperature the movement of the atoms or molecules will be less and they will be near to each other.

The increment of temperature increase the K.E. thus the atoms or molecules move apart from each other.

With the decrease of temperature the movement of the atoms or molecules decreases.  

8 0
3 years ago
What is one difference between an electron and a neutron?
VARVARA [1.3K]

Answer: Neutron has no charge, electron has a charge and mass. Neutron occurs inside the nucleus where electron is seen outside the nucleus.

Explanation:

5 0
3 years ago
reativity of alkali metals increases down the group while reativity decreases down the group in helogens ​
BigorU [14]

Complete question is;

Chemical reactivity of alkali metals increases down the group while reactivity of halogens decreases down the group. Give reasons

Answer:

Explained below

Explanation:

Alkali metals exhibit reactivity due to their electropositivity. Now, for alkalis, their electro-positivity increases down their group. Since their reactivity increases with increase in electropositivity, it means their reactivity also increases down the group.

Whereas, the reactivity of halogens occurs as a result of their electronegativity. Now, electronegativity for halogens decreases down the group. Since their reactivity decreases with decrease in electronegativity, it means that their reactivity will also decrease down the group.

4 0
3 years ago
Why do water molecules and the materials dissolved in water move through the plasma membrane slowly ?
garik1379 [7]

Nonpolar and small polar molecules can pass through the cell membrane, so they diffuse across it in response to concentration gradients. Carbon dioxide and oxygen are two molecules that undergo this simple diffusion through the membrane. The simple diffusion of water is known as osmosis.

4 0
3 years ago
PH is 7.45. Calculate value of [H3O+] and [OH-]
lana66690 [7]

Answer:

The answer is (H30+) =3,55e-8M and (OH-)=2,82e-7M

Explanation:

We use the formulas:

pH= - log(H30+)  and Kwater=(H30+)x(OH-)

pH= - log(H30+)  ----< (H30+)= antilog- pH=antilog- 7,45=3,55E-8M

Kwater=(H30+)x(OH-)

(OH-)=Kwater/(H30+)= 1,00e-14/3,55e-8 = 2,82e-7

8 0
3 years ago
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