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  1. Sintering is a method for making objects from powder, by heating the material...not limited the solid state but still considered part of powder metallurgy is liquid state sintering in which at least one but not all elements are ...

    分類:科學及數學 > 化學 2008年02月03日

  2. ...swn.jpg Image of a flame test for sodium. Note that the yellow color in this gas flame does not...blackbody emission of soot particles (as the flame is clearly a blue premixed complete combustion flame...

    分類:科學及數學 > 化學 2006年12月14日

  3. ...up the respective potentials: E = (-2.71) + (+0.76) = -1.95V. Note that the overall potential of this reaction is negative, which means the reaction is NOT spontaneous. (The...

    分類:科學及數學 > 化學 2010年09月05日

  4. ... Sorry "=" should be an arrow but it just cannot be shown above. Please note that during exams you can't use "=" in such expressions...

    分類:科學及數學 > 化學 2009年01月02日

  5. ... a physical change, not chemical reaction, please note that. When ice is turned into water, i.e. ice is ...a standard enthalpy of formation of zero, as there is no change involved in their formation...

    分類:科學及數學 > 化學 2011年11月17日

  6. A. No reaction occured, since both copper and silver nitrate are in solid form. B. The copper displaces silver ions in...

    分類:科學及數學 > 化學 2013年03月08日

  7. ...g) Metal oxide is formed instead of metal hydroxide. Please note that steam is usually over 100℃, which is the boiling point of water. ...

    分類:科學及數學 > 化學 2007年10月13日

  8. reducing sugar (i.e. all sugars except sucrose) such as glucose, fructose etc. (they are very probable to be present in the drink) please note that they are usually reducing agents in food, and also vitamin C

    分類:科學及數學 > 化學 2010年03月30日

  9. ...question has one tricky point: For (1), please note that flame test can only test for solid sample (the platinum...sample by flame test. (2): As usual, potassium carbonate is soluble in water and iron (III) carbonate is ...

    分類:科學及數學 > 化學 2007年03月04日

  10. ...and SN2, but SN1 may have a larger ratio. The same is true for 3' RX. Please note that 3' RX can easily undergo an elimination reaction instead of a SN1...

    分類:科學及數學 > 化學 2012年06月08日