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  1. ...dative bond is absolutely the same as any covalent bond. The only think to note is that a charge is usually encountered in a dative bond. Consider...

    分類:科學及數學 > 化學 2007年05月07日

  2. ...; Relative atomic masses: K= 39.1, Cl = 35.5) Note that the specific heat capacity of the mixture should be 4.2 kJ kg⁻¹ K⁻¹ or 4.2 J g⁻¹...

    分類:科學及數學 > 化學 2011年06月19日

  3. ... held together by weak van der Waals' forces. ( Note that H+ and Cl- are formed only when HCl is dissolved in water.) (4) is ...

    分類:科學及數學 > 化學 2009年05月22日

  4. ...reagent will be used up first? also note that 2 moles of XY3 is produced per mole of X. remember...sample ) 2011-01-17 17:27:02 補充: micatkie, please avoid supplying answers directly...

    分類:科學及數學 > 化學 2011年01月17日

  5. ...of similar strength. For C, the statement is true but cannot explain the fact since ...or b.p. than those of metals. (3) D Note that in daily life, many electronic devices use...

    分類:科學及數學 > 化學 2007年06月20日

  6. ...(strong alkali) = 11 pH value of M ammonia solution(weak alkali) = 16 ** Note that : the strength of an acid/alkali is NOT related to its pH value ** pH value ...

    分類:科學及數學 > 化學 2011年08月29日

  7. ...overcome the attraction, promoting the electrons to infinity (ionization). note that ENC is NOT the only consideration of I.E. some other factors may...

    分類:科學及數學 > 化學 2011年01月01日

  8. ...charge density of tin(IV) center, if SnCl4 is an ionic compound... think about distortion of electron cloud. 5...while it can form pentavalent fluoride. clearly not nitrogen. 6. note any presence of lone pair electrons when ...

    分類:科學及數學 > 化學 2010年12月20日

  9. ...to several dozen Å. Single molecules cannot usually be observed by light (as noted above), but small molecules and even the outlines of individual ...

    分類:科學及數學 > 化學 2007年07月27日

  10. ... to VSEPR. in fact, sp2 hybridizaton would give trigonal planar. note that empty orbitals don't count. e.g. CH3+ is trigonal planar (three C-H); :CH3- is ammonia-like (three...

    分類:科學及數學 > 化學 2010年09月08日