Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by weak chemical bonds known as view available hint(s)

            Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by weak chemical bonds known as Hydrogen Bond.

                     Hydrogen Bond Interactions are those interactions which are formed between a partial +ive hydrogen atom bonded directly to most electronegative atoms (i.e. Fluorine, Oxygen and Nitrogen) of one molecule interacts with the partial -ive most electronegative atom of another molecule. These interactions are considered the strongest intermolecular interactions and are responsible for many stronger physical properties of water like, boiling point, viscosity, solubility e.t.c.

                       Attached figure shows the hydrogen bond interactions (green dashed lines) between water molecules. The partial charges are shown in red color.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest