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  1. H

    PHYSICS Paper 12

    can we talk about it now ?
  2. H

    HELPPPPPPPPPP PLZ

    Which statements about the reaction of solid sodium bromide with concentrated sulfuric acid are correct? 1 Hydrogen bromide is a product of the reaction. 2 Sulfuric acid is oxidised to sulfur dioxide. 3 Bromide ions are reduced to bromine. WHY 2 AND 3 ARE WRONG ?
  3. H

    2,4 DNP

    will it give a yellow ppt with ALL the carbonyl groups (including carbxylic acids and esters) or with ketones and aldehydes only ?
  4. H

    Physics p22

    can we talk about it now ?
  5. H

    ELECTROMAGNETIC SPECTRUM

    Can some1 plz post here all the values of lemda ?i couldn't find a reliable source for it
  6. H

    HOW WAS YOUR M1 ????

    for me it was quite difficult :( i messed up few questions
  7. H

    %uncertainty PHYSICS 33

    in all the papers they ask about it , how am i suppose to find it? i know the equation :value of uncertainty/actual value X 100% . But have problems with finding the uncertainty value, can some1 help me ?
  8. H

    PHYSICS AS HELP

    http://www.xtremepapers.me/CIE/Internat ... 7_qp_2.pdf Question 6 , b second part , why do we have to multiply by 2 , i thought i need to divide it by 2 :( can't get the reason
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