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ghostanime2001
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The question said carbon-hydrogen analyzer, and reading from the textbook "Chemistry 11" 2003 from Addison-Wesley it doesn't say anything about nitrogen concerning the bulbs that absorb carbon dioxide or water.
ghostanime2001 said:The question said carbon-hydrogen analyzer, and reading from the textbook "Chemistry 11" 2003 from Addison-Wesley it doesn't say anything about nitrogen concerning the bulbs that absorb carbon dioxide or water.
ghostanime2001 said:to be very honest, I am stumped on this one, from head to toe.
ghostanime2001 said:I have read that webpage that you posted. How would I determine the mass of the unknown element in the unknown compound ? Do I assume 100 g ? so then I can subtract the mass of carbon & hydrogen from 100 g to get the mass of the unknown element. But I don't know the molar mass of the compound :( this sucks...
but how would I use that to determine the mass or molar mass of the unknown element ? and therefore the atomic mass of the unknown element ?Posts overlapped. You do have the molar mass of the compound, see #1.
mfb said:@epenguin: While I can find a C,H,N,O combination with the approximate molar mass, how would that look like as a molecule? I think you get 1/2 of a bond somewhere, or a missing/additional hydrogen.
ghostanime2001 said:You're right
but how would I use that to determine the mass or molar mass of the unknown element ? and therefore the atomic mass of the unknown element ?
How could others follow (your advice) if you are not running ahead?epenguin said:That's running ahead!
I did not find a proper solution. Sure, you can make ions or radicals, but I doubt this is an intended solution.I'd think with the number of atoms we have to play with we will be able to think of many molecules within the rules.
That is not just bad luck, it is a fundamental problem and the basis of my post #42.epenguin said:Keep getting near, but there is a conspiracy giving me one H to many or too few - when you change anything you usually gain or lose two H, but I have not concluded.
With just C N O H, a known C/H ratio and the total (small) molecular mass, it is not so hard to find all possible sum formulas.ghostanime2001 said:searching for a compound with fewer than 8 carbons seems like painful work. There are thousands of organic compounds and several compounds could have similar molar mass. I don't think this question was meant to be more confusing than it's meant to be.
ghostanime2001 said:searching for a compound with fewer than 8 carbons seems like painful work. There are thousands of organic compounds and several compounds could have similar molar mass. I don't think this question was meant to be more confusing than it's meant to be.
ghostanime2001 said:I know the reduced ratio of C is 2:5 from 8:20 ratio but I don't undestand what you said there about something having only 7 compounds with the above mentioned ratio.. to be quite honest, I don't really know if this question was meant to be this complicated. I guess I do need some more hints.
ghostanime2001 said:2 carbon compound ?
ghostanime2001 said:Any others would not be compatible because the molecular formula is a integer multiple of empirical formula ?
ghostanime2001 said:empirical formula was C2H5
ghostanime2001 said:C4H10, C6H15
so C4H10 seems to be the most probable compound
ghostanime2001 said:C4H10 has the correct maximum number of hydrogens, 2n+2
but don't we already know the compound is not C4H10
ghostanime2001 said:Why do you say
get the total number of oxygen atoms from CO2 and H2O then multiply that by 2 or 3 (molecular formula integer multiple in C4H10 and C6H15)
ghostanime2001 said:let me just ask, do you already know the answer ? I have read it over 3 times and I still do not know what other information I'm missing. We won't get into the matter of oxygen in the compound, as you've already established that. How would I know there exists another unknown element without knowing the mass of the unknown compound. I have used all the information I'm given, I don't see any other information that I have missed. Maybe it said only "carbon-hydrogen analyzer" so I assume there is carbon and hydrogen ONLY ?
ghostanime2001 said:let me just ask, do you already know the answer ? I have read it over 3 times and I still do not know what other information I'm missing. We won't get into the matter of oxygen in the compound, as you've already established that. How would I know there exists another unknown element without knowing the mass of the unknown compound. I have used all the information I'm given, I don't see any other information that I have missed. Maybe it said only "carbon-hydrogen analyzer" so I assume there is carbon and hydrogen ONLY ?