[Paleo Conservative]

It's not nitrous oxide. Its 100% N₂ gas. The brain is starved of oxygen, but the person being executed doesn't feel being deprived of oxygen due to the carbon dioxide from exhaled gases being taken away.

[Magnum44]

It’s not nitrous oxide but the physiological effect is the same. Painless brain oxygen starvation. I think we are saying the same thing.