Why is water a liquid at room temperature and pressure? Please be concise.
Because water is insufficiently volatile at room temperature and pressure to exist as a gas...........
Was that concise enuff? Well, here, I am going to expand the answer. Water is a highly unusual molecule. It is VERY small, and has very low molecular mass. Nevertheless, it exists as a room temperature liquid. Why? Because hydrogen bonding exists BETWEEN water molecules, and this acts as a potent intermolecular force.
And the propensity for hydrogen bonding results from the polarity of the water molecule, which we could represent as
You should compare the normal boiling of water to that of other small molecules,