Posted by sevag on Sunday, December 9, 2012 at 4:07pm.
Convert g CO2 to g C. 2.868 x (atomic mass C/molar mass CO2 = ?
Convert g H2O to H. 1.567 x (2*atomic mass H/molar mass H2O) = ?
2.00 - gC - gH = g O.
Convert g to mols.
mols = grams/atomic mass
Find the ratio of the elements to each other. This will give you the empirical formula. I came up with C3H8O3 BUT that doesn't make sense considering the molar mass. Check your post for accuracy, especially with the numbers.
You can see what I'm talking about with this.
delta T = Kf*m
Solve for m
m = mols/kg solvent.
Solve for mols.
mols = grams/molar mass
Solve for molar mass and I end up with about 26 which CAN'T possibly be right if the empirical formula is C3H8O3.
Isn't the molar mass 92.09 g/mol? This is what i got with /\T=Kf*m formula. If that's the case then C3H8O3 is the empirical formula and the molecular formula. Correct?
Yes, of course you are right. It was way past my bed time and I guess I just punched the wrong numbers on my calculator. The molar mass is 92 and not the 26 I initially calculated and that makes the C3H8O3 ok for the formula.
Related Questions
skyiline college - A compound of carbon, hydrogen, and oxygen was burned in ...
Chemistry - A compound of carbon, hydrogen, and oxygen was burned in oxygen, and...
Chem--PLEASE HELP 911 - A compound of carbon, hydrogen, and oxygen was burned in...
chemistry - If a sample of a compound of carbon and oxygen contains 3.00g of ...
Chemistry - An unknown compound contains carbon, hydrogen, and oxygen. When ...
Chemistry - The molecular formula of a compound containg only carbon and ...
chemistry - problem 3. A compound Y containing carbon,hydrogen and oxygen was ...
chemistry - 8750 g of a compound which contains only carbon, hydrogen, and ...
Chemistry 1201 - An unknown compound contains only carbon, hydrogen, and oxygen...
Chemistry - A certain compound contains carbon, hydrogen , and oxygen. When 1.00...
For Further Reading
