VCE Stuff > VCE Chemistry
Simple Stoic Qustion.........
bucket:
lol i made such a small and stupid error.
i did 1000kg/112
instead of 1000kg over 55.9.
because it said 2Fe and i was reading it as Fe2.
geez. i need to go to school.
Mao:
*kills self with own stupidity*
I earlier posted a method but was defeated in the shame of bearing the incorrect answer and was deleted
i just realised it was a stupid systematic error of pressing "enter" twice on the calculator.... :( (it ended up adding O3 twice)
method as follows:
keeping in mind of the molar ratio, work out the mass ratio between the two molecules/compounds
hence to produce 1000kg of Iron, 1430 kg of Iron Oxide is required (i rounded it to 4 sig figs)
ps this answer is different to enwiabe's as I used whereas he used 55.9 :P
enwiabe:
Ah okay, 55.9 must be rounded. My bad, the book is right!
Collin Li:
--- Quote from: enwiabe on January 29, 2008, 04:51:12 pm ---Ah okay, 55.9 must be rounded. My bad, the book is right!
--- End quote ---
However, VCAA is wrong. They will only give you these values to one decimal place. So do it the "wrong" way ;)
lanvins:
another stoic question
.5mol of Zn reacts with .5 mol of HCl according to Zn(s) +2HCl = ZnCl2 (aq) H2(g)
Calcualte the amount of hydrogen gas produced, in mol
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