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2. a half life is

  • the time for half the reactants to be used up
  • the time it takes for half the reactants to be made
  • half the time it takes a reaction to reach equilibrium

3. the half life for all 1st order reactions is

  • a curve which is a parabola
  • always constant
  • 1/ initial reactant concentration

4. catalysts in the same phase as the reactants are

  • heterozygous
  • homolytic
  • homogenous
  • homozygous

5. the line for a zero order reaction on a time/ concentration graph is:

  • an upwards curve from 0
  • straight diagonally upwards
  • straight diagonally downwards
  • straight horiontal
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