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Leona [35]
2 years ago
11

Haw many H atom in tow H2O molecules

Chemistry
1 answer:
allochka39001 [22]2 years ago
7 0
Two hydrogen and two oxygen multiply for two
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Is Li has 7 valence electrons
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An important reaction in the formation of photochemical smog is the photodissociation of NO2: NO2 + hv >>> NO(g) + O(g)
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Explanation:

NO_2 + hv\rightarrow NO(g) + O(g)

The maximum wavelength of light that can cause this reaction is 420 nm.

a) The wavelength given lies in the range of visible light range that is from 400 nano meters to 700 nano meters.

The light with wavelength of 420 nm is found in the range of visible light.

b)The maximum strength of a bond :

E=\frac{h\times c}{\lambda}

where,

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h = Planck's constant = 6.626\times 10^{-34}Js

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= E\times N_A=4.733\times 10^{-19} J\times 6.022\times 10^{23} mol^{-1}

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(1 J = 0.001 kJ )

285.13 is the maximum strength of a bond, in kJ/mol, that can be broken by absorption of a photon of 420-nm light.

c) the photodissociation reaction showing Lewis-dot structures is given in an image attached.

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