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Study the set up below and answer the questions that follow.
         Studying a set up

  1. Explain why it is important to heat the water before heating the magnesium ribbon.
  2. Name gas P.  
  3. Write a balanced equation for the reaction which takes place in the combustion tube.     

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  1. To generate steam so as to drive out all the air inside the apparatus
  2. Hydrogen Gas
  3. Mg(s) +H2O(g)→MgO(s) + H2(g)
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