Alcohol is a compound. Pure alcohol is made up of molecules of ethanol. It's molecular formula is C2H6O.
Pure alcohol is far more dangerous than adulterated alcohol because pure alcohol has one hundred percent alcohol in comparison to aldulterated alcohol which is less than 100 percent.
distillation
vodka is made of pure alcohol (distilled to about 95% ABV), diluted with filtered water.
Rubbing alcohol is a solution. What you buy labeled as rubbing alcohol is a mixture of various concentrations of methanol, ethanol, isopropanol, and water, usually around 70% alcohol and the rest water.
30% of however much you drank... e.g. You drank a 50ml shot of 60 proof = 15ml of 'pure' alcohol
Alcohol is a pure substance - C2H5OH.
Isopropyl alcohol itself a pure substance. It is a compound. However, it is sold as a mixture of the alcohol itself and water.
Pure isopropyl alcohol would evaporate more quickly than a mixture of isopropyl alcohol and water. This is because water has a higher boiling point than isopropyl alcohol, which would slow down the evaporation process of the mixture compared to pure isopropyl alcohol.
I have a bottle of Adams "Pure Lemon Extract" made when their plant was in Austin, Texas (pre 2009) labelled "Alcohol 89%".
Rubbing alcohol is not a pure substance, it is made up of a mixture. It is good to rub this mixture on cuts to keep them from getting infected.
Rubbing alcohol is not a pure substance, it is made up of a mixture. It is good to rub this mixture on cuts to keep them from getting infected.