Qualification > Sciences
Chemistry Help HERE ONLY !!
kam:
--- Quote from: THEIGBOY on May 31, 2009, 07:18:00 pm ---
--- Quote from: kam on May 31, 2009, 06:40:34 pm ---i need help in nov 2004 q7
c)
--- End quote ---
number of moles of Fe2(SO4)3 = 1/40 or 0.025
number of moles of Fe2 O3 formed = 1/40 or 0.025
mass of iron(III) oxide formed = 0.025 x 160 = 4g
number of moles of SO3 produced = 3/40 or 0.075
volume of sulphur trioxide at r.t.p. = 0.075 x 25
= 1.8dm3
hope it helps
why do u multiply 0.075 by 25?
and can u attatch p3 1999 mark scheme and que paper
+rep
By the way guyz my rep got reduced.... may i know who did it and why????
--- End quote ---
THEIGBOY:
--- Quote from: reishamix on May 31, 2009, 07:40:39 pm ---
--- Quote from: THEIGBOY on May 31, 2009, 07:34:37 pm ---
--- Quote from: reishamix on May 31, 2009, 07:32:36 pm ---
--- Quote from: THEIGBOY on May 31, 2009, 07:31:21 pm ---argh...sumbudy decreased my rep even more
--- End quote ---
frget rep man
it dsnt mke a differnc
do u hav the mark scheme?? :-[
--- End quote ---
go to www.drop.io/theigboy
the password is in ur inbox....
and download the file... i can't upload it here for some reason...
Which year????
i have all marking schemes from 1999 onwards
--- End quote ---
2003
--- End quote ---
Priceless:
hey igboy der u go...+rep hope it helps u ....lol...gud luck wid ur xams ;)
goin4dakill:
HEYYYY GUYSSS!!!!!!!! PLEASE SOMEONE HELP ME?!
Okay, for Organic chemistry, when they ask you for a starch molecule or sugar molecule... My book gives you a very comlex structure that sort of looks like a crab or..a extented hexagon, with OH-O and H..
But the past paper June 2008 marking scheme (its hard to understand what they want us to give) but a simple square with just an -O- on either side! Really would appreciate it guys!
Good luck! By the way when do u guys have ur exam..? I have mine in about 11 hours.. WOOOT!!!!! **cofffeeee time*****************
reishamix:
--- Quote from: goin4dakill on May 31, 2009, 08:11:47 pm ---HEYYYY GUYSSS!!!!!!!! PLEASE SOMEONE HELP ME?!
Okay, for Organic chemistry, when they ask you for a starch molecule or sugar molecule... My book gives you a very comlex structure that sort of looks like a crab or..a extented hexagon, with OH-O and H..
But the past paper June 2008 marking scheme (its hard to understand what they want us to give) but a simple square with just an -O- on either side! Really would appreciate it guys!
Good luck! By the way when do u guys have ur exam..? I have mine in about 11 hours.. WOOOT!!!!! **cofffeeee time*****************
--- End quote ---
i guess a -O-[BOX]-O-
is all wht they want..
my tchr told us its simpl fr IGz ..
u gotta do tht fr a levls
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