My questions is about when we convert to moles in this problem. Why do we convert C and H to moles, then grams, and not say O and H and then find the grams of C from them. Or why can't we just find the moles of O from the given weight of H2O? Basically, why is O excluded in finding moles in the first part of the problem. I understand we need to subtract from the given weight 0.1342 grams but don't know why we can't just subtract g of O and grams of C why must it be C and H. 9. A 0.1342-gram sample of an unknown compound composed of C, H, and O was burned inair, producing 0.240 g of CO2 and 0.0982 g of H2O. If the molar mass of the compound is222.4 g/mole, determine its empirical and molecular formulas.c Cx Hy O* + O2O013429 air0.a40 geo, lmale COp Imole CThe reston Scrap paper.1.5120.2409 0.098a90.30.00545mole12.0119C44.09g€02ImolecoeO.06546gcImolc0.09829H20Imol HaoQ HmolesImolett20=D0.0109mol .0089H18.015 gH2018.01-0.07649 9.0577900.0577l90Imol0I5.999g030.003607nmol oO.O654 69C+0.0109we conrert Fogramsto Aind O.0.076499

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Answered: 9. A 0.1342-gram sample of an unknown…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 81AP: For each of the following incomplete and unbalanced equations, indicate how many moles of the second...

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My questions is about when we convert to moles in this problem. Why do we convert C and H to moles, then grams, and not say O and H and then find the grams of C from them. Or why can't we just find the moles of O from the given weight of H2O? Basically, why is O excluded in finding moles in the first part of the problem. I understand we need to subtract from the given weight 0.1342 grams but don't know why we can't just subtract g of O and grams of C why must it be C and H.

9. A 0.1342-gram sample of an unknown compound composed of C, H, and O was burned in
air, producing 0.240 g of CO2 and 0.0982 g of H2O. If the molar mass of the compound is
222.4 g/mole, determine its empirical and molecular formulas.
c Cx Hy O* + O2
O013429 air
0.a40 geo, lmale COp Imole C
The reston Scrap paper.
1.51
2
0.2409 0.098a9
0.
30.00545mole12.0119C
44.09g€02
Imolecoe
O.06546
gc
Imolc
0.09829H20
Imol Hao
Q Hmoles
Imolett20
=D0.0109mol .0089H
18.015 gH20
18.01
-0.07649 9.057790
0.0577l90
Imol0
I5.999g0
30.003607nmol o
O.O654 69C
+0.0109
we conrert Fograms
to Aind O.
0.076499

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