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Posted by on Friday, September 10, 2010 at 7:59pm.

If you leave a glass of tap water out long enough, the water will evaporate and leave behind a white solid.

  • College Chemistry - , Friday, September 10, 2010 at 7:59pm

    Yep.

  • College Chemistry - , Friday, September 10, 2010 at 8:26pm

    Is this a physical or chemical
    change?

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