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  1. S

    A level Biology: Post your doubts here!

    HELP! How do we find the diameter? I bet I am going wrong with the conversions or something :/
  2. S

    A level Biology: Post your doubts here!

    Ohhhh, thanks! :)
  3. S

    A level Biology: Post your doubts here!

    Also for this magnification question, to find the image size, do I measure the length of the entire picture? Or just the width of a single Xylem vessel??
  4. S

    A level Biology: Post your doubts here!

    Correct answer is B.
  5. S

    A level Biology: Post your doubts here!

    HELP! HOW DO WE DO THIS?!
  6. S

    Chemistry: Post your doubts here!

    Lol, that wasn't my doubt :P It was why Na2CO3, didn't react with OH, turns out it just doesn't :P Thanks though.
  7. S

    Chemistry: Post your doubts here!

    T reacting with an excess of Na NaO2CCH(ONa)CH2CO2Na ----> Over here Na, replaces the H in the alcohol group. U reacting with an excess of Na2CO3 NaO2CCH(OH)CH(OH)CO2Na ---> Over here it doesn't. :s Why?
  8. S

    Chemistry: Post your doubts here!

    Oh, riiiight. There is just so much to remember!! :@ And I forget after two days, the little details. Thanks for your help though, if I somehow manage to get an A, it'll be because of you guys helping me out here :P
  9. S

    Chemistry: Post your doubts here!

    How do I know what the damn cyclic compound looks like? :'( I am so DONE with chemistry. -_-
  10. S

    Chemistry: Post your doubts here!

    How do we figure out the bond angle in this case?
  11. S

    A level Biology: Post your doubts here!

    How do we calculate the maximum number? :/
  12. S

    A level Biology: Post your doubts here!

    What? How can this be C? The average to that is 9.2, not 9. :s
  13. S

    A level Biology: Post your doubts here!

    Guys! I need help in this one! Correct answer is B.
  14. S

    A level Biology: Post your doubts here!

    HELPPPP!! Correct answer is C.!
  15. S

    Chemistry: Post your doubts here!

    HNE is a reactive compound. CH3(CH2) 4CH(OH)CH=CHCHO (c) Give the structural formulae of all of the carbon-containing compounds formed in each case when HNE is reacted separately with the following reagents. (i) hot concentrated manganate(VII) ions in acid solution. So what I came up with is...
  16. S

    A level Biology: Post your doubts here!

    How do we solve this? The correct answer is C.
  17. S

    A level Biology: Post your doubts here!

    Thanks!!! :)
  18. S

    A level Biology: Post your doubts here!

    Also this one! Correct answer is C again.
  19. S

    A level Biology: Post your doubts here!

    How do we solve this? Correct answer is C.
  20. S

    A level Biology: Post your doubts here!

    THANK YOU, THANK YOU, THANK YOU GUYS!! <3
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