Which gas according to Lavoisier is respirable air ?

Antione Lavoisier is appreciable because

Which gas in the atmosphere is essential for respiration?

According to combined gas law.

Which gas present in air is essential for aerobic respiration? What is the role of oxygen during respiration?

Which gas do you think is Lavoisier talking about when he says chalky acid gas ?

What was the contribution of Lavoisier to chemistry?

What gas was produced by combustion according to Lavoisier ?