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  1. xIshtar

    CHEM DOUBT

    One mole of gas takes up 24dm^3 at room temperature. I linked the question on the other thread.
  2. xIshtar

    All chemistry Doubts here :)

  3. xIshtar

    All chemistry Doubts here :)

    Apologies, I meant to write HOOCCH=HCCOOH.. I get your answer, but there are only supposed to be 4 Hydrogens? Yours has 6.. This is where I got confused :P
  4. xIshtar

    Chemistry Paper 1 Doubts Here... !

    I needs your help On the P3 doubts thread
  5. xIshtar

    Maths C2!!!!!!!!!!!!

    I'm in year 11 too, I did my Maths a year early too :P I'm did C1,C2 and S1 this year :P
  6. xIshtar

    Currently Listening To?

    It's Friday, Friday, gotta get down on Friday.. Everybody's looking forward to the weekend, weekend.. On another note: Cigarettes and Valentines - Greenday
  7. xIshtar

    very important!!!(need answers for p1 chem 1999)

    Two words: Google it. http://www.google.com/#sclient=psy&hl=e ... 00&bih=725 Might find it there.
  8. xIshtar

    All chemistry Doubts here :)

    For Hydra: The formula for the acid is C4H4O4 right. So, it is an acid. As it is dibasic, 2 H+ ions for every one mole reacted. Now, taking this into account, it should be possible to split it into two equal parts.. HOOCCH=HOOCCH The truth is, the question is rather challenging, and I do...
  9. xIshtar

    Boring !!!!

    Heh, I have been enjoying a week of stress free revision. It allowed me to catch up on a lot of stuff. :P
  10. xIshtar

    (our teacher can't ans)plz ans this question its VIP

    Question number?
  11. xIshtar

    All chemistry Doubts here :)

    Dibasic refers to the fact that for every mole of acid used, there are 2 moles of H+ ions.
  12. xIshtar

    Currently Listening To?

    And listening to Lamb of God - Black Label.
  13. xIshtar

    Currently Listening To?

    Win. An incredibly fun song to play, the beat is just so awesome.. I have to listen to it now :p Ahh Skillet ftw, Comatose is the best though (:
  14. xIshtar

    Chemistry doubt

    The hydrogen is reduced as it changes from a H+ ion into a H2 gas. Meaning, electrons were gained. The zinc changes into zinc ions in the solution as it gets smaller. This means it changes from Zn to Zn2+, meaning that it loses electrons, and thus it is oxidised.
  15. xIshtar

    Physics p31 discussion (come we didnt discuss it at all)

    I think it was like 2620 or something like that in seconds.. Because you had to work out the time taken for the shockwave to be felt, 240s, then the difference between that and the time taken for the tsunami to arrive. What did you guys write for the measurements to be taken for the power? I...
  16. xIshtar

    Pls Help !! Chemistry paper 3 ???

    Ahh, I think I know how to find x too. If 1 mole reacts to form 1 mole of CO2, then 3 + x = 5 => x = 2.
  17. xIshtar

    Pls Help !! Chemistry paper 3 ???

    You sure, where did you find the ms?
  18. xIshtar

    Pls Help !! Chemistry paper 3 ???

    For the first one: d.i) 1 mole takes up 24dm^3, so 5 moles were formed. ii) If 5 moles were formed, then using the second equation, (EDIT) As the question says that 1 mole was formed, y=2. iii) I have no idea how to find x. For the second one: a) Energy Saved = 250 x 95/100 =237.5 This...
  19. xIshtar

    May/June 2011 exams

    Not sure what to expect, I'd like to achieve it in all my 8 subjects, but I don't want to get too confident or anything, as I still have 4 exams I could mess up on..
  20. xIshtar

    guyz, quick paper 1 question

    I think it would be Copper (ii) Oxide.. Mainly because, copper firstly would be too low in the reactivity series to react with the HCl itself.. So I just thought of it like preparing salts, ie, an insoluble base and an acid produces a soluble salt right? So in theory it should be Copper (ii) Oxide.
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