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 …

During an analysis of a hydrocarbon, a 10.5 g of sample underwent complete combustion to produce 17.5 L of CO2 at SLC. A separate experiment showed the molar mass of the gas to be …

Firstly, does 120 g have 3 or 2 significant figures in chemistry? After working out a compounds empirical formula, when I found out the that the 'actual' thing is double in term …