How did they get the limiting reactant as O2???

Explain which atom l or m is more stable and why

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Calculate the number of moles of ethane in 100 grams