Plz help! Covalent bonding is referred to as “sharing” electrons. Is it really sharing? Why or why not?

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

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?

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?