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  1. P

    physics p2 help!

    thank u so so so much~~~
  2. P

    physics p2 help!

    2001 AND 2002...
  3. P

    physics p2 help!

    01 october QS 3(c) n 8(b) 02 may QS 3(b)(iii) and 4(d)why in downward direction???
  4. P

    chem p1 m/j 09 qs.

    yeah.absolutely!!! :)
  5. P

    chem p1 m/j 09 qs.

    whats the product if potassium astatide reacts with dilute H2SO4? I go through the textbook bt it only explained the reaction with conc.H2SO4.. 09 MJ Q 11, Q 19(I can only find 2 chiral centres) and Q 20( it has only 3 double bond.... how can it has 8 cis-tans isomer..)
  6. P

    chem p1 m/j 09 qs.

    and QS 11??
  7. P

    chem p1 m/j 09 qs.

    mj 09 QS 6, 9, 16( dont understand options b,c,d), 17 (why (NH4)2SO4 IS an ionic salt)
  8. P

    chemistry p1 help!! plz.

    yeah. thx again.
  9. P

    chemistry p1 help!! plz.

    mj 08 Q 26,27,28,40??? Any one? plz
  10. P

    chemistry p1 help!! plz.

    Sorry.a lot of qs again..my chem sucks. mj 06. QS 6,26,28,32
  11. P

    chemistry p1 help!! plz.

    why an element can have different oxidation no.? e.g Cl,N,S ???? AND why not beryllium have same oxidation no in all of its known compounds?
  12. P

    chemistry p1 help!! plz.

    yeah.thank u~ :D
  13. P

    chemistry p1 help!! plz.

    what abt sodium hydroxide??? i think it also produces 1 H+ in h2o....
  14. P

    chemistry p1 help!! plz.

    thx.!!!!! a little bit confusion abt QS11, i think the products catalyses the reaction means it is a catalyst.but the definition for catalyst is a chemical substance which speeds up a chemical reaction w/o being used up. so why the reactants are used up??????
  15. P

    chemistry p1 help!! plz.

    sorry 2 bother u guys again... can sum1 tell me how to do mj02 QS 11,13,30 AND Q 39 why between X and Y the C-Hal bond will be lengthening. mj 04 QS 9. REALLY APPRECIATE OF UR HELP!!!!
  16. P

    chemistry p1 help!! plz.

    mj 03 Q2,Q8,Q20,Q27. Any 1 plz.....really need ur help///
  17. P

    chemistry p22 help!!

    i really appreciate it.but i think the structural formula of the alcohol c is CH3CH2OH. cuz CH3COOH+ CH3CH2OH----------CH3COOCH2CH3 (which is exactly C4H8O2)+H2O ???// AND why HCO2CH(CH3)2 has the same structure as that of ester B. How do i know this?????/
  18. P

    chemistry p22 help!!

    In this way the answer is = +44 -1367--1411means -1367+1411=+44
  19. P

    chemistry p22 help!!

    to:intel1993 thank u so much!!
  20. P

    chemistry p22 help!!

    4 Sulphuric acid is used in many industrial processes of major importance. The first stage in the manufacture of sulphuric acid is to pass air over burning sulphur. The emerging gas has the following composition by volume. sulphur dioxide 10% sulphur trioxide 0.2% oxygen...
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