|Apr20-10, 08:54 AM||#1|
Finding Molecular formula from a given molecular mass and equation.
The question is as follows:
A compound contains only carbon, hydrogen and oxygen. When 1g of the compound is reacted completely with oxygen, 2.2 g CO2 and 1.2 g H2O are obtained. The molar mass is close to 60. What is the molecular formula?
I first wrote the equation: compound + O2 = CO2 +H20 (is this right?)
Using the equation no.moles = no. grams/molar mass I found the number of moles of each to be:
O2: no. grams/32
Using these I found that (if the above equation is right) that the amount of the compound used is ~ 4.012*amount of H2O produced.
I also found the molucular mass of the compound CxHyOz to be: 12x+y+16z = 60
I'm not sure if everything I tried was necessary or correct however now I seem to be going around in circles with everything I do and can't seem to be able to reach an answer.
Any help in solving this would be very much appreciated.
|Apr20-10, 09:35 AM||#2|
Check your textbook for empirical formula calculation.
chemical calculators - buffer calculator, concentration calculator
www.titrations.info - all about titration methods
|Similar Threads for: Finding Molecular formula from a given molecular mass and equation.|
|Molar mass to molecular formula||Biology, Chemistry & Other Homework||17|
|Help with finding molecular formula at a specific P, V, T||Biology, Chemistry & Other Homework||3|
|how to find the molecular formula out of the molar mass?||Biology, Chemistry & Other Homework||2|
|Finding molecular formula||Biology, Chemistry & Other Homework||1|
|Chemistry - Finding Molecular Formula||Biology, Chemistry & Other Homework||1|