Hydrocarbons

• What Is viscosity?

  How thick something is
• Do hydrocarbons with a long chain have higher or lower viscosity?

  Higher (They are thicker)
• What is the general formula of alkenes?

  CnH2n
• What is the general formula of alkanes?

  CnH2n+2
• How many carbon atoms does hexene contain?


  6
• How many hydrogen atoms does propane have?


  8
• Why can't methene exist?

  Due to the double carbon to carbon bonds in alkenes.
• What is the general equation for incomplete combustion?

  hydrocarbo + oxygen -> carbon monoxide + carbon + water
• What is the general equation for complete combustion?

  Fuel + Oxygen -> Carbon Dioxide + Water + Energy
• What are three problems with burning fossil fuels?

  Air pollution, greenhouse effect [global warming], they run out
• What do catalytic converters do?

  Change harmful gas into harmless gases. Like:

  carbon monoxide + oxygen -> carbon dioxide

  …and…

  nitric oxides -> nitrogen + oxygen
• What is a homologous series?

  A group of hydrocarbons with the same general formula and similar chemical properties.
• What is the general formula of cycloalkanes?

  CnH2n