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#### huskywolf

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« on: November 01, 2009, 02:38:33 PM »
Hi I have a quick question on this:calculate mol of Fe3O4 formed when:

24g of Fe reacts with 10g of O2 to produce Fe3O4
so Fe3O4= 3Fe +2O2 does this mean that I mutilply the mass of (fe)24g by 3 beacause the coefficent is 3(Mol)and multiply O2 mass(10g) by 2???

or do i keep the original mass so n=34g/232gmol=0.146 mol Fe3O4
0r would it be n=92g/232gmol=0.396 mol Fe3O4

Thanks

#### Borek

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##### Re: quick Stoichiometry question please...
« Reply #1 on: November 01, 2009, 03:19:52 PM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

#### huskywolf

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##### Re: quick Stoichiometry question please...
« Reply #2 on: November 01, 2009, 03:25:38 PM »
Sorry that doesnt help me.
I know about mole ratio ,I dont understand if i need to multiply the mass by the coefficents in the question I got
I would be thankful if you could just answer me yes or no?

#### huskywolf

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##### Re: quick Stoichiometry question please...
« Reply #3 on: November 01, 2009, 03:35:40 PM »
Can anybody HELP me with this please?
I am stuck on this ,I need to get my assignment done soon
I cant waste hours looking through unhelpfull sites
surely there are helpful people out there???

#### huskywolf

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##### Re: quick Stoichiometry question please...
« Reply #4 on: November 01, 2009, 03:42:21 PM »

#### DrCMS

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##### Re: quick Stoichiometry question please...
« Reply #5 on: November 01, 2009, 05:10:13 PM »
you've posted the same question twice and have been given advice to follow.  This is a limiting reagent question so start working through it like that.

#### theangrybaby

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##### Re: quick Stoichiometry question please...
« Reply #6 on: November 20, 2009, 03:51:01 AM »