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Chemistry: Post your doubts here!
YUUCKKK BIO i got a U in bio last year in my AS cuz i hate that subject (teacher made me hate it) -
Chemistry: Post your doubts here!
if the question says "fully displayed" then yes u have to show every single bond or u will lose the mark for not showing it displayed. this applies more to optical isomerism -
Chemistry: Post your doubts here!
if it didn't specify then i am sure it is accepted in any form but maybe since professional examiners set up the marking scheme for A levels then they draw the structures in skeletal formulas most of the time -
Chemistry: Post your doubts here!
hmm i think that this question is the question where it says no oxygen atom is attached to carbon because if this is the case then ur answer is wrong plus ur answer is not fully displayed so it is wrong yeah. is this the question where it says no oxygen is attached to carbon=carbon double bond? -
Chemistry: Post your doubts here!
are you doing both AS and A2 this year ? -
Chemistry: Post your doubts here!
haayyy english plsss! :P i see this as fdlkfqjdn;d;rk :o -
Chemistry: Post your doubts here!
inorganic chapters (periods and groups) are pain in da A$$ chapters!!! :( -
chem p5 urgent doubt
yeah this is the question that i couldn't do and i need someone to explain the whole of it cuz i didn't get it still :S i am sorry i wont be able to help u in it -
chem p22..doubt?
stay on the safe side and do it structural as it is told in the question. if the marking is strict they MAY not give u credit for that -
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Chemistry: Post your doubts here!
homolytic fission is when a molecule breaks and each atom in the molecule take its "sharing" electrons and become free radical CL-CL + UV LIGHT ---> radicals of chlorine...this is an example of homolytic fission -
Chemistry: Post your doubts here!
first of all the empirical formula is given as CH2O with Mr =90 so the molecular formula is c3H6O3. where did you get C6H8O7 from? :o -
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Chemistry: Post your doubts here!
read what i said to above to shai the post above this oneand u will be able to answer this question. i explained it above -
Chemistry: Post your doubts here!
solve till u feel u r confident with this paper! i really don't know the exact answer to this question -
Chemistry: Post your doubts here!
carbonyls are organic compounds that have the C=O formula. they give orange ppt when tested with 2,4-DNPH NOTE: carboxylic acids has the C=O group but it doesn't give a positive test with the 2,4-DNPH. Both aldehydes and ketones have carbonyl groups and they give positive results with 2,4-DNPH... -
Chemistry: Post your doubts here!
you have the ratio to 1 : 1.341 : 1.166 they r not 1:1:1 so multiply all of them by 2 then see if the numbers u get are close to a whole number like for example 4.999 or 4.0021 or kinda close to a whole number if 2 is wrong then multiply by 3 if not then by 4 and go on i found that multiplying... -
Chemistry: Post your doubts here!
good luck on ur english exam though! -
Chemistry: Post your doubts here!
i can help if u have questions u have? -