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  1. The moisture in air condensed on the cold surface of the can.

    分類:科學及數學 > 化學 2008年09月24日

  2. ... that the melting point of H is lower than that of D. D may be deeped into molten H and take it out for cooling. However, this is not a good way to do it . ...

    分類:科學及數學 > 化學 2008年04月06日

  3. ...water. when the benzoic acid is concentrate enough, let the solution cool. (estimation of concentration / saturation: dipping a glass rod into solution, take it out and let it cool. if solid appears on the glass rod after cooling, the...

    分類:科學及數學 > 化學 2010年10月06日

  4. When the cup of ice-cream is taken out form the freezer, it 's temperature is lower than the melting point. As...

    分類:科學及數學 > 化學 2006年12月31日

  5. ... it yet? 2012-01-20 21:03:38 補充: a. Dip a glass rod into the solution and take it out , observe whether there are any small crystals formed on the surface of glass rod. b. There are two main points: 1. Little...

    分類:科學及數學 > 化學 2012年01月20日

  6. ... water can cause serious burns. Sometimes even the act of taking the container out of the oven and or putting it on the bench can cause the boiling. The following ...

    分類:科學及數學 > 化學 2007年10月18日

  7. ...blood dirty? Ans: No, it isn't .Why?Ans: Blood just comes out of the sloughed off endometrium...they ease this problem? Ans: Taking paracetamol. 3.What ...

    分類:科學及數學 > 化學 2008年01月01日

  8. ...l) → 2[Al(OH)4]-(aq) Therefore, when a number of bubbles are observed, take out the aluminium oxide and rinse it with fresh water. Now, the aluminium article is free of ...

    分類:科學及數學 > 化學 2009年08月13日

  9. ... and aluminum foil. If you must use foil, take it home instead of throwing it away. You can use it again... and best ways to keep pollution out of the environment are in your hands...

    分類:科學及數學 > 化學 2008年02月13日

  10. ... left to cool down for a while. Take out the silvery grey solid and measure its mass (denoted by M) by...an electronic balance. Equation of reaction is: 2AgxO(s) ---&...

    分類:科學及數學 > 化學 2007年04月13日