to make 250.0L of hydrogen gas: how many moles of water would need to react and how many moles of oxygen would be produced?

The p sub shell can hold up to 8 electrons in an atom. true or false?

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy