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More simple chemical changes

  1. Feb 5, 2006 #1
    2. An unknown gas was burned in oxygen to produce nitrogen gas and water vapor. Was the unknown gas an element? Explain.

    6. You are given two liquids. One is a pure compound, and the other is a solution. How could you distinguish the two liquids?

    These are not found in text book. They are probably simple answers. Any ideas. Help would be appreciated.
  2. jcsd
  3. Feb 5, 2006 #2
    I can help you in the first question.

    X + O2 --> N2 + H2O

    The elements that are in the products must be in the reagents. Therefore, X cannot be an element since you have in the products H and N. It must be a compound of nitrogen and hydrogen.

    In what concerns the second question I am not sure. If the solution is heterogeneous is simple to distinguish, but if it is not, I don't know. Sorry.
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