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  1. The answer is C, 1st is wrong while 2nd is true. The 1st statement is wrong. As sulphur is solid in room condition, while helium is gas in room ...

    分類:科學及數學 > 化學 2007年03月22日

  2. ... is reminded that the reading should be taken at eye level. Stopper the volumetric flask and invert it for a few times...

    分類:科學及數學 > 化學 2007年04月09日

  3. With reference to my previous answer: http://hk.knowledge.yahoo.com/question/question?qid=7008022404747 圖片參考: ...

    分類:科學及數學 > 化學 2008年03月31日

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