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Each water molecule is joined to _____ other water molecules by ____ bonds. each water molecule is joined to _____ other water molecules by ____ bonds. four ... polar covalent two ... hydrogen two ... polar covalent four ... hydrogen three ... ionic

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Each water molecule is joined to four other water molecules by hydrogen bonds.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

Because of hydrogen bonds, water has higher melting and boiling temperatures. 

Answer:   Each water molecule is joined to four other water molecules by hydrogen bonds.

Explanation:  As we know that the hydrogen bonding is a type of bonding in which the hydrogen attached to the electronegative atom of one molecule makes electrostatic forces of attraction with the electronegative atom of the other molecule.

Thus hydrogen which is attached to the electronegative oxygen atom will make a bond with the oxygen atom of the other molecule of water . Thus four types of binds can be formed with the one molecule of the water.

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