Chemistry, 20.12.2019 18:31 pablogonzaleztellez

An important reaction in the formation of photochemical smog is the photodissociation of no2: no2 + hv > > > no(g) + o(g) the maximum wavelength of light that can cause this reaction is 420 nm. a) in what part of the electromagnetic spectrum is light with this wavelength found? b) what is the maximum strength of a bond, in kj/mol, that can be broken by absorption of a photon of 420-nm light? c) write out the photodissociation reaction showing lewis-dot structures.

Answers: 2

Show answers

Answers

Answer from: zeldawhite76

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,

E = energy of photon = Energy required to break single molecule of nitrogen dioxide

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

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength = $420 nm=420\times 10^{-9}m$

$E=\frac{6.626\times 10^{-34}Js\times 3\times 10^8 m/s}{420\times 10^{-9}m}$

$E=4.733\times 10^{-19} J$

Energy required to break 1 mole of nitrogen dioxide molecules:

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

=285,012.66 J/mol=285.13 kJ/mol

(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.

An important reaction in the formation of photochemical smog is the photodissociation of no2: no2 +

Answer from: Quest

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Another question on Chemistry

Chemistry, 22.06.2019 04:00

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)

Answers: 1

Answer

Chemistry, 22.06.2019 06:00

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Answers: 2

Answer

Chemistry, 22.06.2019 07:30

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

Answers: 1

Answer

Chemistry, 22.06.2019 10:30

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o

Answers: 1

Answer

You know the right answer?

An important reaction in the formation of photochemical smog is the photodissociation of no2: no2 +...

Questions

Chemistry, 13.07.2021 01:00

describes the three dimensional highly repeating particles within a solid. A. Amorphous B. Metallic C. Mole...