Where do the electrons on a hydrogen atom spend most of their time when they are combined with oxygen in a water molecule

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?