AP BIOLOGY

Detailed explanation-1: -Each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing the hydrogen atoms attached to neighboring water molecules.

Detailed explanation-2: -Opposites attract, so this lopsided charge difference allows bonds to form between the hydrogen and oxygen atoms of adjacent H2O molecules. Each H2O can bind to a maximum of four neighbors through these so-called hydrogen bonds.

Detailed explanation-3: -It has a sp3 hybridization. Here, the two hydrogen bonds are formed by the two hydrogen atoms and the two lone pairs of electrons present on the oxygen atom attract other hydrogen atoms which can form hydrogen bonds. Thereby, the water molecule can form four hydrogen bonds.

Detailed explanation-4: -The oxygen has two lone pairs which can be donated to form two other hydrogen bonds, so a water molecule can form four hydrogen bonds. So, the maximum number of hydrogen bonds formed by a water molecule are4.

Detailed explanation-5: -Each H2O molecule forms four H-bonds, two with O-atom and two with H-atoms.