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Empirical formula

Hey guys could u clarify this for me as the answer in the book does not match mine. Thanks :

calculate empirical formula of a compound with the following composition: C 39.13%, O 52.17% , H 8.700%

i got CH3O but the book says sumthing diff thanks again :P


how do i work this out:

what mass of iron(3)oxide would need to be reduced to produce 100tonnes of iron in a blast furnace
Reply 1
Avatar for Mitchy0283
Mitchy0283
I get the ratio of C:O:h: to be

3.25 - 3.25 - 8.7 , which is 1 - 1 - 2.67,

What is the answer in the book?
C3H8O3
Reply 3
Avatar for alishpie
alishpie
I worked it out to CH3O,what does the book say?
I got the same answer too! I'm not quite sure where we've gone wrong here...
Reply 5
Avatar for chuck111
chuck111
OP
11
Mitchy0283
I get the ratio of C:O:h: to be

3.25 - 3.25 - 8.7 , which is 1 - 1 - 2.67,

What is the answer in the book?


c3h8o3
Reply 6
Avatar for chuck111
chuck111
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11
EierVonSatan
C3H8O3


plz explain howu got tht :smile:
chuck111
plz explain howu got tht :smile:


ratio is C;H;O 1;8/3;1 => multiply by 3 => 3;8;3

2.67 isn't close enough to 3 to suggest CH3O
Reply 8
Avatar for chuck111
chuck111
OP
11
EierVonSatan
ratio is C;H;O 1;8/3;1 => multiply by 3 => 3;8;3

2.67 isn't close enough to 3 to suggest CH3O



thxs m8 :smile:
Reply 9
Avatar for chuck111
chuck111
OP
11
sorry to ask again lol but im working through sum questions ummm

how do i work this out:

what mass of iron(3)oxide would need to be reduced to produce 100tonnes of iron in a blast furnace
chuck111
sorry to ask again lol but im working through sum questions ummm

how do i work this out:

what mass of iron(3)oxide would need to be reduced to produce 100tonnes of iron in a blast furnace


Fe2O3 ----> 2Fe

find how many moles 100 tonnes of iron is then halve this value to find the moles of Fe2O3 --> find its mass
Reply 11
Avatar for chuck111
chuck111
OP
11
EierVonSatan
Fe2O3 ----> 2Fe

find how many moles 100 tonnes of iron is then halve this value to find the moles of Fe2O3 --> find its mass


thnxs lol i got 50tonnes ur a machine man :P
chuck111
thnxs lol i got 50tonnes ur a machine man :P


No, use moles not mass...you start with more mass than you end up with....

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