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Chemistry Y12 > The Ozone Story(OZ) > Flashcards

The Ozone Story(OZ) Flashcards

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1
Q

What are the main sources of carbon dioxide?

A
  • Combustion of hydocarbon fuels e.g. power stations
  • Deforestation
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2
Q

Four Points

What are the main sources of methane?

A
  • Cattle farming
  • Landfill sites
  • Rice paddy fields
  • Natural gas leakage
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3
Q

What are the main sources of nitrous oxide? (Two points)

A
  • Ferilised soils
  • Changes in land use e.g. from soil when the land is ploughed up
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4
Q

What is the main source of carbon monoxide?

A

Incomplete combustion of hydrocarbons e.g. from car exhausts

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5
Q

What is the main source of nitorgen oxides?

A

Internal combustion e.g. from the reaction of N2 and O2 at high temperatures

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6
Q

How do you calculate concentration in ppm from a percentage?

A

Multiply by 10,000

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7
Q

What are the main gases in unpolluted air?

A

Nitrogen,oxygen and argon

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8
Q

What is the equation that links wavelength, speed of light and frequency?

A

speed of light=wavelength x frequency

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9
Q

What is the speed of light?

A

3.00 x 10-8

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10
Q

What is the equation that links energy of a photon, frequency and planck constant?

A

energy of a photon=planck constant x fequency

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11
Q

What is planck constant?

A

6.63 x 10-34

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12
Q

What happens to molecules when energy interacts?

A
  • Translation
  • Rotation
  • Vibration
  • Electronic
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13
Q

Three points

Why is ultraviolet (UV) radiation dangerous?

A
  • Breaks chemical bonds, including the bonds found in DNA
  • Damage proteins
  • Irriate blood vessels
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14
Q

How do sun creams protect against UV radiation?

A

Sun creams absorb UV radiation before it reaches the skin

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15
Q

What is ozone a pollutant?

A

Photochemical smog

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16
Q

What is homolytic fission?

A

One of two shared electrons goes two each atom, producing radicals

17
Q

What is heterolytic fission?

A

Both of the shared electrons go to just one of the atoms when the bond breaks

18
Q

What are the three stages of a radical chain reaction?

A

Initiation, propogation and termination

19
Q

What are the three types of imbs?

A
  • ID-ID
  • PD-PD
  • Hydrogen bonding
20
Q

What is a nucleophile?

A

A species which donates an electron pair in a reaction. They have a high electron density

21
Q

Give two example of nucleophiles

A

:OH and :NH3

22
Q

What is an electrophile?

A

A species which accepts an electron pair in a reaction. They have area of low electron density

23
Q

Give two examples of electrophiles

A

H+ and NO2+

24
Q
A

Chemistry Y12 (6 decks)

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