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CHEMISTRY HELP!!! URGENT !!!! GYAAH!!

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nox_fjmoony:
Um yeah, I was doing this paper and got stuck in questions:

19, 21, 22, 25, 26, 33, 36, 37 and 38.
Would really appreciate it if someone could help me out. Thanks in advance.
~Nox

12345abc:
hey,the attachment wont open...can u tell which year they are from alongwith the syllabus code(it's 5070,i think)...

nox_fjmoony:
sure mate. Its the o/n session, chemistry..code is 5070. Paper 1.

12345abc:
19-the ans is 40 tonnes since of u look closely,2 mol of NH3 give 1 mol of ammonium nitrate. 17 tonnes makes 1 mol of ammonia,so 0.5 mol of ammonium nitrate will be there. mass=mol. x Mr ,so 0.5 x 80= 40 tonnes.
21.increasing pressure. reaction would move in the 4ward direction since the ratio of volumes is 4:2,more ammonia would be obtained and by increasing pressure, the frequency of effective collisions would also increase,thus the rate will be higher.
22.lowering the temp...slope of exp.2 is not as steep as 1. change in type or amount of catalyst is pointless since catalysts are not used up. B would give a smaller volume of oxygen.
25. A is the correct option.it is a neutralisation reaction and neutralisation AND precipitation reactions are non-redox
26.C. magnesium sulphate would form which is soluble.
33. C. silica is a non-metal,so its oxide will be acidic. no redox occurs since its oxidation state remains +4.
36. D. from acids,we always take away -OH and from alcohols we take H. cut these radicals from both sides of the monomers and u'll see.
37. i'm not sure,but i think it is ammonia. hydrogen does react. water also does,as in making alcohols,and bromine also reacts as in testing for unsaturation.
38. A. this is a fact. u'll know better if u've studied biology.

hope this helps :)

nox_fjmoony:
Hey man, thanks a LOT. Thanks SO MUCH!!
I really appreciate it. ^_^

You don't know how much you've helped me. Thankyou. Thankyou very very much.
 ;D

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