11g of a hydrocarbon was completely burnt in air and 18g of water was produced. What is the empirical formula for the hydrocarbon?

To 20cm3 of a gaseous hydrocarbon. 80cm3 of oxygen were added. After explosion and cooling to room temperature, the residual gases occupied 70cm3. After absorption by KOH, 30cm3 of …

a)propane b)1-propanol c)propanoic acid d)methyl ethanoate I got to the empirical formula of C3H8 and knew I was stuffed cause I had no idea how to use the 24.0g. Guessed a) anywa …