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CHEM AND BIO HELP AND TIPS HERE

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cooldude:

--- Quote from: @d!_†oX!© on November 10, 2009, 02:55:03 pm ---ok people..here i am again...

Tungsten metal, W, is manufactured by reducing tungsten(III)oxide, WO3, whit carbon.

WO3 + 3C -----> 3CO + W

Calculate the mass of carbon needed to reduce 116g of tungsten(III)oxide.

-------------------------------------------------------------------------------------------------------------------------------
Now, I know how to do it.
We first take out the number of moles of WO3
which comes out to be 116/232 = 0.5 moles
Then, as the ratio is 1:3
Thus, the number of moles of C = 0.5*3 = 1.5 moles
Thus, the mass of carbon = 1.5*12 = 18g

Now my question,
if the ratio according to the equation is 1:3 for WO3:C
The how is it possible that for 116g of WO3 only 18g of C is required?

So, i thought maybe i have done it wrong although this is the correct method itself, but i still tried
Having the mass of WO3 as 116g and the ratio being 1:3
thus, the mass of C be 3*116 = 348g

But, the second method is wrong, isn't it?
then how are we getting 18g as the mass of Carbon required??

Please help guys!!!


--- End quote ---

dude ur first method is right, ur second method is wrong. it doesn't matter what ur ans is as long as ur working is right. and also no need to get disconcerted by ur ans, it is likely u'll get such an ans cuz wolfram has such a high Ar

@d!_†oX!©:
what difference does it make if it has a high Ar????
i already said it myself that the first method is the right one...but the answer has to be a valid one dude...
u cant just right 24/6=7 if your calci says so....

@d!_†oX!©:
GUYS WHERE ARE YOU ALL?????????????????IS THERE NOBODY TO ANSWER THIS QUUESTION OR YOU GUYS DON'T WANNA HELP?? :P :P
PLEASE GUYS HELP ME OUT!!!!!

eightAs:

--- Quote from: @d!_†oX!© on November 10, 2009, 03:10:36 pm ---what difference does it make if it has a high Ar????
i already said it myself that the first method is the right one...but the answer has to be a valid one dude...
u cant just right 24/6=7 if your calci says so....

--- End quote ---
Dude everything depends on moles. Mole ratio is 3:1. Masses follow because of moles.
Consider this
mass required = Moles required * Ar
So it depends on both Ar and mass

@d!_†oX!©:
dude i understand what u are saying but tell me what will be the answer to my question...the one that i have posted above....seee...the loooong one!!!

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