Lavoisier developed a new theory of combustion that overturned the phlogiston theory. what measurements were central to his theory, and what key discovery did he make?

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?