Gases in the Atmosphere

• Explain why carbon forms in an incomplete combustion?

  oxygen supply is limited
• Describe one way that the combustion of petrol causes acid rain?

  impurities in petrol like sulfur, when this burns it reacts with oxygen and produces sulfur dioxide which reacts with rain water
• What percentage of the air is nitrogen?

  78
• What percentage of the air oxygen?

  21
• What percentage of the air is argon?


  0.9
• What percentage of the air is carbon dioxide?

  0.037
• What do you see when magnesium ribbon is heated?

  white powder, bright white light
• What colour flame is sulfur?

  blue
• What colour flame is hydrogen?

  invisible pale blue
• Describe the formation of co2 from the thermal decomposition of metal carbonates as an equation?

  metal carbonate -> metal oxide + carbon dioxide
• Describe teh formation of co2 from the thermal decomposition of copper carbonate as an equation?

  copper carbonate -> copper oxide + carbon dioxide
• What colour powder is copper carbonate?


  green
• What colour powder is copper oxide?

  black
• Explain the greenhouse gas effect?

  electromagnetic radiation at most wavelengths from sun pass through atmosphere, earth absorbs radiation and warms up, some heat is infrared, some of infrared is absorbed by greenhouse gases, atmosphere warms up