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IGCSE CHEMISTRY DOUBTS

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princess12:

--- Quote from: furqan on June 06, 2010, 07:20:00 am ---winter 09
question 6 c

how do u do that???

--- End quote ---
number of moles of FeSO4 used = 12.16/152 = 0.08
number of moles of Fe2O3 formed = 0.04
mass of one mole of Fe2O3 = 160 g
mass of iron(III) oxide formed = 0.04 × 160 = 6.4 g
number of moles of gases formed = 0.08
volume of sulfur trioxide formed = 0.08 × 24 = 1.92dm3

princess12:
did u get it furqan

username:
yh
i think so
thx vry much!!! ;D

NidZ- Hero:
1.23 g of barium carbonate produces 0.12dm3 [of co2 when treated wid excess hydrochloric acid
calculate the % purity of barium carbonate
thanz if any 1 culd help
 :)

WARRIOR:

--- Quote from: Nidzzz on June 06, 2010, 09:05:57 am ---1.23 g of barium carbonate produces 0.12dm3 [of co2 when treated wid excess hydrochloric acid
calculate the % purity of barium carbonate
thanz if any 1 culd help
 :)

--- End quote ---
80%?

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