generate questions: In one experiment, Lavoisier observed that there was no overall increase in weight when tin and air were heated in a closed container. He noted that air rushed in when he opened the container, which indicated that part of the trapped air had been consumed. He also noted that the tin had increased in weight and that increase was the same as the weight of the air that rushed back in. This and other experiments on combustion were documented in his book Sur la combustion en général, which was published in 1777. In that work, he proved that air is a mixture of two gases; 'vital air', which is essential to combustion and respiration, and azote (Gk. ἄζωτον "lifeless"), which did not support either. Azote later became nitrogen in English, although it has kept the name in French and several other European languages.
What did Lavoisier conclude was consumed by combustion in his experiments? {sep_token} In what way did Lavoisier see that the tin he used in his experiment had increased? {sep_token} What did Lavoisier perceive the air had lost as much as the tin had gained {sep_token} In what year did Lavoisier publish his work on combustion? {sep_token} What second part of air was deemed lifeless by Lavoisier?