Chemistry Problem plz plz plz help!!?

I've asked 6 people in a tutor clinc and they all can't figure out how to do this problem. please Help.





1. An unknown compound contains only Carbon, Hydrogen, and Nitrogen. Upon analysis it is found to contain 60.0 percent Carbon. When 4.00g of the compound is completely combusted, all of the hydrogen is converted to 0.595 g of water.





a) Determine the mass of ech element in a 4.00 g sample of the unknown compound.





b) determine the empirical formula for the unknown compound.





C) Given that the molar mass of the compound is about 362 g/mol, what is its molecular formula?





Please help me I'm begging of you!!!

Chemistry Problem plz plz plz help!!?
Ask your teacher
Reply:A) c 2.4


h .066


n 1.534





B)C3HN2





C)C15H5N10





Im not sure if thats right though... Just check with sumone else before...
Reply:evil!!!
Reply:.4 x4 = 1.6 gm of H and N.





if all the H burns to .595 gm of H2O





H=1


O=16





H20 = 18








2/18 of the .595 is Hydrogen





You can do the rest.
Reply:Organic Chemistry Resources





http://www.gregreeve.freeola.com/chemist...





http://www.liv.ac.uk/Chemistry/Links/ref...





http://www.organic-chemistry.org/





http://www.chemhelper.com/





http://www.organicworldwide.net/





______________________________________...


Composition of Matter





http://sps.k12.ar.us/massengale/chapter_...





http://www.refdesk.com/science.html





http://mistupid.com/chemistry/periodicta...





http://www.chemtutor.com/unit.htm





http://www.creative-chemistry.org.uk/





http://www.chem4kids.com/





http://www.chem4kids.com/files/elem_intr...





http://www.sciencenewsforkids.org/





http://www.actstudent.org/testprep/





http://www.mistupid.com/chemistry/





http://search.lycos.com/index.php?src=T7...








Good luck for the future.





Kevin, Liverpool, England.
Reply:ok, what you need to do first is look in your book and find the molar masses of carbon, hydrogen, oxygen, and nitrogen. You know that 60% is carbon so you know your proportion of C in the compound. What you need to do is figure out the percentage of H so you can deduce the % of N. The way to do that is to calculate how much hydrogen is in 0.595 g of water, thats where your molar masses of O and H come in. Once you've figured out how much H is in that much water, you also know how much is in 4 grams of the compound. With the molar mass of C you also know how much is in the 4 g sample (60 % of 4 grams and then convert using the molar mass of C). Subtract the two from the rest and you know how many grams of N are left. Use the molar mass of N to figure out how much that is and there you have you're proportions, and from there its a simple calculation to find your molecular formula.