I'm somewhat uncomfortable with the lack of details around how the execution is performed - is the mask snug enough to ensure a fairly pure N2 environment, how

I'm somewhat uncomfortable with the lack of details around how the execution is performed - is the mask snug enough to ensure a fairly pure N2 environment, how long will the condemned be left to asphyxiate, etc. But, compared to most other means of execution, this should be fairly painless; certainly, it'll be better than electrocution, lethal injection, or HCN gas.