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  1. ...with 1 mole of 3-ethylcyclopantene. since there are no other functional group, u will not be need to protect other functional groups which i dont know how to do it anyways...

    分類:科學及數學 > 化學 2008年04月15日

  2. ...magnesium is much more reactive than copper, and thus heating is not needed when magnesium is used. The equation is: Mg + ...

    分類:科學及數學 > 化學 2011年02月05日

  3. ...molar mass=40gmol-1)so the answer is A.The calculation is not needed .(also I don't know)

    分類:科學及數學 > 化學 2013年03月17日

  4. ... of O remains -2 throughout. Hence it is not a redox reaction. For examples of redox reaction, please go to http...

    分類:科學及數學 > 化學 2007年07月12日

  5. ... always to Cu2+ with F2, Cl2, Br2, I2(may not react or need strong heating)

    分類:科學及數學 > 化學 2008年10月03日

  6. Option A: It is only true when elements X and Y are in the same period, e.g. in Period 4, K is more reactive than Ca. Option B: If so, then it's X more reactive than Y...

    分類:科學及數學 > 化學 2009年03月09日

  7. Your question is about calcium carbonate in eggshell but you want to know how to standarize HCl & NaOH and toxic chemicals in the wild world. Actually what do you want to know about eggshell ?

    分類:科學及數學 > 化學 2008年12月01日

  8. i think u need a ticket, but not sure if it is the same now. there are lots of interesting...memory, they are interesting to every one, even to people who does not like science, there are lots of games, many little games...

    分類:科學及數學 > 化學 2008年08月06日

  9. ...02 12:13:21 補充: Yes, Argon molar mass = 40 But this will not affect the ans of this Q 2009-08-03 12:13:32 補充: Yes, but...

    分類:科學及數學 > 化學 2009年08月04日

  10. 生物 化學

    分類:科學及數學 > 化學 2007年01月11日