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  1. T

    Why bother

    *Grabs popcorn* Let the fight begin!!!
  2. T

    Chemistry: Post your doubts here!

    A2 or AS, multi choice or structured paper
  3. T

    Chemistry: Post your doubts here!

    Well the molecule is a cis-molecule so its either A or C it has a formula of C20H28O, which is also CnH2n-12O. It has some double bonds, an aldehyde group and a cyclohexene ring Lets start of with an alkane and change it into the molecule in question An alkane has a formula of CnH2n+2 If you...
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    Chemistry: Post your doubts here!

    Can someone help? Aqueous sodium chloride (brine) is electrolysed by using inert electrodes in a cell which is stirred so that products of electrolysis react with each other. The cell is kept cold. Which pair of substances is among the major products? A hydrogen and chlorine B hydrogen...
  5. T

    Chemistry: Post your doubts here!

    Nvm seems that Muhammad Asif is on a roll!
  6. T

    Chemistry: Post your doubts here!

    I'm on it! Give me a minute
  7. T

    Chemistry: Post your doubts here!

    Anyway this is how you do it: FeTiO3=151.7grams per mol TiO2=79.9 grams per mol Therefore the same moles of TiO2 as FeTiO3 will weigh 79.9/151.7 times as FeTiO3 so 79.9/151.7 * 19 tonnes= 10 tonnes A
  8. T

    Chemistry: Post your doubts here!

    The full equation isnt really too important, you just need to know this: FeTiO3-->TiO2 + other stuff What you need to know is that 1 mole of FeTiO3 gives one mole of TiO2
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    Ask me any Chemistry or Physics questions here, I'll try my best to respond when I can

    Ask me any Chemistry or Physics questions here, I'll try my best to respond when I can
  10. T

    Chemistry: Post your doubts here!

    The Cl radical can bond to any CH3 or CH2 carbons by substituting a hydrogen. There are 5 such carbons here, however there are 3 CH3 groups bonded directly to the alpha central carbon. If the Cl radical bonds to any three of this, you get the same molecule. The 3 CH3 groups form only one type of...
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    Chemistry: Post your doubts here!

    Remember this: Bond breaking is endothermic(positive) and Bond making is exothermic(negative) Enthalpy changes: P=+193 Br-Br bond broken Q=-244 Cl-Cl made R=-340 C-Cl made S=+410 C-H broken Answer C. RQPS
  12. T

    Chemistry: Post your doubts here!

    You just ignore it the formula would be Kc=[Fe 3+]/[Ag +][Fe 2+]=.56/.44*.44
  13. T

    Chemistry: Post your doubts here!

    Thanks! :) That was a tough one By the way I answered your question too
  14. T

    Chemistry: Post your doubts here!

    No point telling you my method, i got the wrong answer too
  15. T

    Chemistry: Post your doubts here!

    I answered your first question, here is the next one: When you polymerise, you start with many monomers to make one or a few polymers, because you are combining monomers. so if you start with one mole of monomers, you combine them and you end up with less monomers, therefore the answer could be...
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    Chemistry: Post your doubts here!

    its winter 2011 variant 13 question 12. No examiners report out yet unfortunately http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_13.pdf
  17. T

    Chemistry: Post your doubts here!

    2. Total Flask Volume=5+10= 15dm3=15/1000 m3 Next work out the number of moles of helium and neon with pv=nRT n=pv/RT Since RT is constant throughout, let's make life easier by letting RT be an unknown, let's say A For helium: n=[12000*(5/1000)]/A For Neon: n=[6000*(10/1000)]/A Total n=120/A...
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    Chemistry: Post your doubts here!

    I asked this question already, but just thought I post it again since we're on a new page. An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture. Ag+(aq) + Fe2+(aq) -->...
  19. T

    Chemistry: Post your doubts here!

    I don't understand? Do you mean what is the question? If you mean that, you just replied to it EDIT: Ooops sorry!!! Here's the question: What is Kc?
  20. T

    Chemistry: Post your doubts here!

    answer is A. Here's a good link to explain why: http://www.chemguide.co.uk/inorganic/group7/halideions.html Also check out my question if you can help me
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