- #1

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made of carbon oxigen and hydrogen

and this material burned in oxigen

which gives 3.425 gram of CO_2

and 0.971 of H_2O ??

what is the ampiric formula of the material

??

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- Thread starter transgalactic
- Start date

- #1

- 1,395

- 0

made of carbon oxigen and hydrogen

and this material burned in oxigen

which gives 3.425 gram of CO_2

and 0.971 of H_2O ??

what is the ampiric formula of the material

??

- #2

Borek

Mentor

- 28,706

- 3,196

1258 posts and you still don't know that you have to try by yourself before asking for help?

- #3

tiny-tim

Science Advisor

Homework Helper

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made of carbon oxigen and hydrogen

and this material burned in oxigen

which gives 3.425 gram of CO_2

and 0.971 of H_2O ??

what is the ampiric formula of the material

??

Hi transgalactic!

What equations do you think are involved, and what constants do you need to know?

- #4

symbolipoint

Homework Helper

Education Advisor

Gold Member

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- #5

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- 0

and 0.05389869 moles of H_2O

what to do next??

it not a whole numbers

and i dont know how to build balancing equations for this

??

- #6

symbolipoint

Homework Helper

Education Advisor

Gold Member

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i have 0.077824106 moles of CO_2

and 0.05389869 moles of H_2O

One of those values looks familar; the other I do not remember. I solved the problem on my own several days ago.

what to do next??

See my last post on this topic. At first, you do not yet know the actual coefficients for the reactant compounds.

The coefficients are unknow to start with, just as the subscripts for the atoms in the unknown compound. You need basic algebra-arithmetic skills. The decision on which final WHOLE numbers to find will come as one of your last steps. I initially found nonwhole values for one or more subscripts in the atoms of the compound also. The process was finished by finding a whole number factor which would keep all subscripts as extremely close to whole OR whole; and just good judgement.it not a whole numbers

and i dont know how to build balancing equations for this

??

- #7

- 1,395

- 0

i have to find coefficient for C O H

C=x

O=y

H=z

x+0=0.077824106

y+2=2*0.077824106+0.05389869

z+0=2*0.05389869

how to get whole cofficients from this decimal numbers

??

- #8

- 437

- 1

can you calculate the number of moles of CO2 you obtain?! If the products are CO2 and H2O only, then all the Carbon from the initial material have gone into CO2.

so, if you have x mol of CO2 formed, then you should have had x mol of Carbon in the initial substance.

Using this same logic you can find out for Hydrogen.

but for Oxygen it is going to be a little bit tricky since the oxygen in the product comes from both the initial material and the oxygen gas supplied. you have find an alternative path!

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