Chemistry Quiz on empirical and molecular formula

AI Thread Summary
The discussion revolves around determining the molecular formula of an unknown organic compound based on combustion analysis, which produced 35.2 g of carbon dioxide and 18.0 g of water. Participants analyze the ratios of carbon and hydrogen derived from the combustion products, leading to confusion regarding the presence of oxygen in the compound. They highlight that while all carbon and hydrogen in the products must come from the compound, the oxygen in carbon dioxide and water cannot be solely attributed to it. The conversation emphasizes the need to consider the molecular weight and the possibility of additional elements, such as nitrogen, in solving the problem. Ultimately, the participants express frustration over the lack of sufficient information to definitively determine the compound's formula.
  • #101
You're both right. It was a now you see it now you don't, that's it ah no sort of thing.

The other unconvincing thing was (I had thought of trying azo-compunds) I found a site that gives possible structures from molecular formula called ChemSpider which gave me

HN=N+=NCHCH3CHOHCH3 and variations.

We have a charged molecule. Charged molecules like quaternary amines are quite respectable. They have to be in salts though. And I thought things like this were very unstable, even explosive. Not likely to be in a student excercise.
 

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