You would need to include your weight to determine your BAC with any accuracy.
% volume
about 40 at 5% alcohol volume
18
20 hours
About four to five, depending on the drinks. Perhaps less.
In many jurisdictions a person is considered legally intoxicated at ,08 BAC.
Alcohol poisoning can occur after consuming a large amount of alcohol in a short period of time. The specific number of drinks that can lead to alcohol poisoning varies depending on factors like a person's weight, metabolism, and tolerance level. In general, excessive consumption of 4-5 drinks in a short period of time can be dangerous and increase the risk of alcohol poisoning.
technical ethanol? if this is meant to be "pure" alcohol a.k.a ethanol if you drink this in large amounts you will almost definetly die of alcohol posioning. This is why so many people died from drinking moonshine because it had such a high alcohol concentration in the drink.
Thousands.
That would depend on the size and gender of the drinker, and how rapidly the drinks were consumed. It is possible to drink indefinitely and not reach that level if one drinks slowly enough.
one if you're awesome
It depends on other factors, especially how recently you've eaten.