Write the condensed structural formulas and names for all constitutional isomers with the formula c4h9br

There are four isomeric haloalkanes with molecular formula C4H9Br
   The primary bromides are 1-bromobutane,
  CH3CH2CH2CH2Br, and 1-bromo-2-methylpropane,
  (CH3)2CHCH2Br
   The secondary bromide is 2-bromobutane,
  CH3CH2CHBrCH3.
   The tertiary bromide is 2-bromo-2-methylpropane,
  (CH3)3CBr.

A. ​it generates energy from carbohydrates.b. it requires activation by oxygen.​c. ​it is used by cells to dispose of excess electrons

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.