alkenes

• What is the molecular formula of ethene?

  c2h4
• What does the displayed formula of ethene show?

  All atoms and covalent bonds
• Why are alkenes considered unsaturated?

  They have at least one double bond
• How do you calculate the number of hydrogen atoms in alkenes?

  Multiply the number of carbon atoms by two
• What is the general formula for alkenes?

  cnh2n
• If propine has three carbon atoms, how many hydrogen atoms does it have?

  Six hydrogen atoms
• What is the molecular formula of propine?

  c3h6
• What is the molecular formula of butane with four carbon atoms?

  c4h8
• Where can the double bond be placed in butane?

  Between any two adjacent carbon atoms
• What is the molecular formula of pentine with five carbon atoms?

  c5h10
• What does it mean that alkenes have two fewer hydrogen atoms than alkanes?

  They have a double bond instead of single
• How many hydrogen atoms does ethane have compared to ethene?

  Ethane has six hydrogen atoms
• What is the relationship between ethane and ethene in terms of hydrogen atoms?

  Ethene has two fewer hydrogen atoms
• What is the molecular formula of ethane?

  c2h6