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: compound: ~0.0167mol O2: no. grams/32 CO2: 0.05mol H2O: 0.067mol 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. Thanks, Sarah.