How many brain cells are killed from alcohol?

Actually, no brain cells are killed. Studies show that communication between brain cells is just damaged by the abuse of alcohol but largely irreversible.

Scientific medical research has actually demonstrated that the moderate consumption of alcohol is associated with better cognitive (thinking and reasoning) skills and memory than is abstaining from alcohol. Moderate drinking doesn't kill brain cells but helps the brain function better into old age. Studies around the world involving many thousands of people report this finding.