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  1. I think you have a fundamental misconception in "logic" or meanings of English. Burning is "a form" of combustion means there are many types of "Combustion" and buring is only one type of combusion. "...

    分類:科學及數學 > 化學 2014年10月23日

  2. 1. because nitric acid do not have enough oxidizing power to oxidize gold.gold can react with halogen(very high oxidizing power) ,Aqua Regia and Cyanide. 2.plastic is a very large group,there are a lot of kinds of plastic.they are all organic chemical...

    分類:科學及數學 > 化學 2012年04月10日

  3. ...mixture. k) Put the wooden block on an electronic balance l) Mix the content thoroughly by stirring it with a glass rod. I'm not sure whether the ...

    分類:科學及數學 > 化學 2011年08月13日

  4. 1.(a) A white solid (scum) is formed. When castor oil is hydrolyzed in heated sodium hydroxide solution, soap (ROONa) is formed and separated. The soap solution forms scum with calcium ions in the lime...

    分類:科學及數學 > 化學 2010年04月13日

  5. ...zipper-lock plastic bag or glass jar out of direct sunlight. *Wash hands thoroughly with soap and scrub under fingernails with a brush after working with...

    分類:科學及數學 > 化學 2008年03月04日

  6. ...in vegetable. Herein are the procedures: 1. Wash thoroughly the vegetable in water to avoid surfac contamination. 2. Dry the vegetable and cut...

    分類:科學及數學 > 化學 2008年02月02日

  7. ...dimensional textured privacy glass—the smoke cloud does not obstruct an image, but thoroughly scrambles it.

    分類:科學及數學 > 化學 2007年12月08日

  8. ... (if gloves are not used, wash hands thoroughly after handling chemicals). d. Nuclear Substances...

    分類:科學及數學 > 化學 2007年06月06日

  9. ...2.add excess mixture of sodium hydroxide and iodine solution until yellow ppt formed thoroughly 3.evaporate/ discard the water 4.weigh the ppt with a electronic balance explanation: this...

    分類:科學及數學 > 化學 2007年04月06日

  10. ...same volume of detergents of different brands into each respectively shake thoroughly and let them stand for minutes until emulsified layer ...

    分類:科學及數學 > 化學 2007年03月31日