How dense is a gallon of rubbing alcohol?
The density of rubbing alcohol is about 0.8 g/millilitre depending on how much water is in it and whether it is based on ethanol or isopropyl alcohol. The density doesn't depend on the volume.
The density of rubbing alcohol is 75% that of water. Thus ice (frozen water which is roughly equal in density to liquid water), sinks in rubbing alcohol since it has more mass per cubic millimeter than the alcohol does. In order to float, the object would have to be less dense than the alcohol per cubic space.
Answer#1 The alcohol, being less dense will float on top. They do not react. This answer is nonsense. Alcohol and bleach will mix, and they react, but not in a way that will kill you. Alcohol is less dense than water or bleach (water plus sodium hypochlorite) but alcohol and water do mix... mixed drinks, anyone?