How much pure alcohol in a liter of beer 5%?
5%, i.e. strength of the drink, indicates the percentage of pure alcohol to the total volume of the drink. Therefore, in 1 liters (1000 ml) contains 1000 / 100 * 5 = 50 ml of pure alcohol.
By the way, even medical alcohol has a strength of 96%, i.е. is not pure alcohol
Approximately 20-25gram of alcohol in a liter of beer