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Search results

  1. H

    Chemistry 9701/P22

    well wat was that empirical formula......18.9/16 : 81.1/56......ne we get the simplest ratio abt 1.22 which is approximately 1...so formula was BaO
  2. H

    Chemistry 9701/P22

    :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!:
  3. H

    Chemistry 9701/P22

    it was carbon dixide......simple.....
  4. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reagents and conditions for reactions in organic chemist
  5. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reagents and conditions for reactions in organic chemist butanol------>bromobutane reagents: sodium bromide and conc. sulfuric acid conditions: heat under reflux
  6. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reagents and conditions for reactions in organic chemist moderator make it stick...wat the hell r u waitng for.....and also that obs. link
  7. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reagents and conditions for reactions in organic chemist HALOGENOALKANE----->>> nitrile REAGENT: KCN/NaCN CONDITIONS: heat uder reflux with ethanolic KCN HALOGENOALKANE ------>>> amine reagent: excess conc. AMMONIA conditions: heat eith ethanolic ammonia in a sealed tube (under pressure)
  8. H

    ~AS Bio doubts Here !!~

    nidzzz09......explain me water properties of surface tension and how they are beneficial to pond skaters....WHY it is difficult to eradicate TB
  9. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reactants and conditions in organic chemistry FREE radical substitiution Reacts at room temperature if exposed to sunlight or U.V. light.
  10. H

    Reagents and conditions for reactions in organic chemistry

    Re: Reactants and conditions in organic chemistry :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!: :Yahoo!:
  11. H

    Observation of the reaction of period 3 elements

    see the graphs in book....allright guyx....some body post reagents and condition for organic reaction....though i ll paste them later.if any1 could help......
  12. H

    infectious disease....

    well they are risk factors bt don not describe how its transmitted.......well....papillary muscle contraction prevent the valves from being forced inside out .....am i correct??....or else tell me what thing prevents valves from being forced out the other way around
  13. H

    bio er o/n 2010

    23
  14. H

    infectious disease....

    well.....People suffering from TB are treated using antibiotics. Recently, multi-drug resistant TB (MDR-TB) has developed, making the disease more difficult to treat. Suggest how this drug resistance may have arisen ?...plz comment on quality of my anser....this is wat i mfearing m not good at...
  15. H

    bio er o/n 2010

    plz somebady attach it....or pm me
  16. H

    infectious disease....

    tuberculosis as its air-borne found all over the world with most no. of case in region with high population and overcrowded conditions.....also its an oppurtunistic disease of AIDS..so found in americas as AIDS Is present there....TRANSMISSION....when an infected person coughs or snezzez he...
  17. H

    Observation of the reaction of period 3 elements

    .atomic radius decrease across the period due to increase in effective nuclear charge since shielding effect remains constant.........ionic radius....from Na to Al......ionic radius decreases since they all are isoelectronic with increasing proton no....
  18. H

    Observation of the reaction of period 3 elements

    sticky......
  19. H

    infectious disease....

    ...hmm now cn u tell me abt how cholera is transmitted,... will writng only this be enuf by drinking contaminated water or contaminated food????
  20. H

    infectious disease....

    State two roles of water within plant cells other than taking part in breakdown reactions. cn any1 explain this marking scheme point..."(in vacuole) pushes chloroplast to edge of cell"
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