[yuheng_wu]

Given
- incomplete combustion of atom X gives the following:
- X + O₂  1,5 . 10^-2 mols CO₂ + 4,5 . 10^-2 mols CO + 4,5 . 10^-2 mols H₂O

Question: which atom is x?
a/ C₂H₂
b/ C₄H₆
c/ C₄H₈
d/ C₄H₁₀

The answer is b, but how do you solve this question? How do you know/calculate which atom X is?

[AWK]

Hydrocarbon X !
Count moles of atoms C and H and find ratio

[yuheng_wu]

Hydrocarbon X !
Count moles of atoms C and H and find ratio

I understand now, thanks a lot!

[yuheng_wu]

Hydrocarbon X !
Count moles of atoms C and H and find ratio

And if it were a complete combustion of the hydrocarbon X, do you have to count the amounts of O₂ as well in that situation? Or when do you have to consider the ratio of O₂ as well?

[AWK]

You are not asking for anything related to oxygen, that is, the amount of oxygen needed for this reaction.