Question

hydrogen bonds are intermolecular forces in which a hydrogen covalently bonded to a very electronegative atom is also weakly attracted to a lone electron pair of another electronegative atom. hydrogen bonds always involve hydrogen, whose valence electrons are not shielded from the nucleus by other electrons. they form between molecules that have hydrogen bonded to a very electronegative atom, commonly fluorine, chlorine, oxygen, or nitrogen. these covalent bonds are strongly polar. the partially positive hydrogen atoms and the partially negative atoms in the molecules are attracted to each other to form hydrogen bonds between the molecules. hydrogen bonds are a particularly strong type of dipole interaction and are the strongest of all the intermolecular forces. however, it is important to remember that hydrogen bonds are still a weak force, and they are not bonds.
hydrogen bonding in water there are strong hydrogen bonds between water molecules. each o—h bond in the water molecule is highly polar. the o has a slightly negative charge, and the h has a slightly positive charge. the positive region of one water molecule attracts the negative region of another water molecule, forming a hydrogen bond.
no hydrogen bonding methane (ch₄) is a nonpolar molecule. carbon is not highly electronegative, and the c—h bonds are not polar. therefore, there is no hydrogen bonding between methane molecules.
22 ccc patterns explain whether hydrogen bonding is present between hydrogen fluoride (hf) molecules.

Explanation:

Hydrogen bonding occurs when a hydrogen atom covalently bonded to a highly electronegative atom (such as fluorine, oxygen, or nitrogen) is also weakly attracted to a lone electron pair of another electronegative atom. In HF, hydrogen is covalently bonded to fluorine (a very electronegative atom). The H - F bond is strongly polar, with H having a partially positive charge and F having a partially negative charge. The partially positive H of one HF molecule can be attracted to the partially negative F of another HF molecule, forming a hydrogen bond.

Answer:

Hydrogen bonding is present between hydrogen fluoride (HF) molecules.