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4 Written questions

3 Multiple choice questions

  1. (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)
  2. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
  3. a process to synthesize ammonia on an industrial scale. developed by German chemist Fritz Haber and Carl Bosch, the process has enabled humans to double the natual rate of nitrogen fixation on Earth and thereby increase agricultural productivity, but it has also dramatically altered the nitrogen cycle

3 True/False questions

  1. law of mass action(chemistry) the law that states the following principle: the rate of a chemical reaction is directly proportional to the molecular concentrations of the reacting substances


  2. heterogeneous equilibriaan equilibrium involving reactants and/or products in more than one state


  3. le chatelier's principleif a system at equilibrium is subjected to a small change the equilibrium tends to shift so as to minimize the effect of the change