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  1. S

    how was chemistry paper 22

    Is it Calcium or Mg?
  2. S

    how was chemistry paper 22

    just gotta hope that I dont get more than -10 cause of silly mistakes sigh... Would S be considered to form a toxic gas?
  3. S

    how was chemistry paper 22

    it can form double bonds c=c alkenes?
  4. S

    how was chemistry paper 22

    Mg is the one which sinks right?
  5. S

    how was chemistry paper 22

    The molecular formula for the ester was the empirical formula x2 right?
  6. S

    how was chemistry paper 22

    :) Good luck to you! ace it! :)
  7. S

    how was chemistry paper 22

    ah damn. I wrote +3.... so many silly mistakes it really frustrates me.
  8. S

    how was chemistry paper 22

    ah shoot there goes a mark.. :'( .. Do you remember the oxidation number question?
  9. S

    how was chemistry paper 22

    Thanks! :) For the first organic question with the box where it had Br2 in an inert organic solvent, does the -OH group get replaced by Br? aswell as the double bond breaking?
  10. S

    how was chemistry paper 22

    The skeletal formula had a carboxylic group yeh? and the last organic question where it said identify the group was it COOH as the "r" and the one which reacted with the Na2CO3?
  11. S

    how was chemistry paper 22

    The first question where it had an organic part did it ask for a displayed formula or a structured?
  12. S

    how was chemistry paper 22

    pH of MgCL is 6.5 and pH of NaCl is 7
  13. S

    how was chemistry paper 22

    I couldnt complete the moles sum T_T.. I kept getting 2. something for the weight of the compound.. For the first question is it okay to write "A weak base does not dissociate completely , NH4+ -> Nh3 + H+ or is that wrong?
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