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IGCSE CHEMISTRY DOUBTS HERE !!!!

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Romeesa-Chan:

--- Quote from: Assi1993 on December 31, 2011, 01:12:51 pm ---heelloo frieds can anyone pleasseeeeee solve this question today?? its urgent..

8.   A gaseous organic compound, X, was burnt in an excess of oxygen. A 0.112 dm  sample of X, measured at s.t.p., produced 0.88 g of carbon dioxide.
How many carbon atoms are there in one molecule of X?
 waiting
thankuuuu SF

--- End quote ---

Shouldn't this be in the A-level section ?

~ Miss Relina ~:
inQ 4 F (ii) here http://www.xtremepapers.com/CIE/Cambridge%20IGCSE/0620%20-%20Chemistry/0620_w06_qp_6.pdf


I would like to know why it is drawn below zinc ones instead of being below the magnesuim powder one

plz soooon reply

NotAbod:
Zinc is more reactive than iron, Magnesium is more reactive than both.

Reactivity series, here is how you learn it:

K   Kitten
Na   not
Ca   Cat
Mg   make
Al   a
Zn   Zoo
Fe   For
Pb   Poor
H2   Hungry
Cu   Childeren
Ag   (and these too just learn them silver comes first and then gold)
Au   

So the sentence is: kitten not cat, make a zoo for poor hungry children, silver and then gold.


Learn the reactivity series, it will help you.

Arthur Bon Zavi:

--- Quote from: Abod on April 02, 2012, 09:11:24 pm ---Zinc is more reactive than iron, Magnesium is more reactive than both.

Reactivity series, here is how you learn it:

K   Kitten
Na   not
Ca   Cat
Mg   make
Al   a
Zn   Zoo
Fe   For
Pb   Poor
H2   Hungry
Cu   Childeren
Ag   (and these too just learn them silver comes first and then gold)
Au   

So the sentence is: kitten not cat, make a zoo for poor hungry children, silver and then gold.


Learn the reactivity series, it will help you.


--- End quote ---

The reactivity series is given in data booklet in the form of  standard reduction potentials.

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