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4 Written questions

3 Multiple choice questions

  1. 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
  2. the expressions that describes the relationship among the concentrations (or partial pressures) of the substances present in a system at equilibrium. Numerator=products raised to coefficients, and denominator=reactants raised to coefficients. *It depends only on the stoichiometry of the reaction, not on its mechanism
  3. (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)

3 True/False questions

  1. 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


  2. catalyst(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected


  3. chemical equilibriuman equilibrium system in which all reactants and products are in the same state


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