Lab: Ionic and Covalent Bonds Answers

A polar covalent bond joins the hydrogen and nitrogen atoms in ammonia (NH3).

The two strands of a DNA molecule are separate molecules that are held together by weak electrostatic attractions.

When sodium chloride (NaCl) dissolves in water, the positive poles of the water molecules are attracted to the negative chloride ions, and the negative poles of the water molecules are attracted to the positive sodium ions.

Which of the substances shown below most likely exhibit hydrogen bonding with other identical molecules? Check all that apply.

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A mixture of chlorine gas (Cl2) and fluorine gas (F2):

A mixture of hydrogen sulfide (H2S) and hydrogen chloride (HCl):

A mixture of water (H2O) and ammonia (NH3):

Adding soap to water disrupts the hydrogen bonding between water molecules. A water strider is standing on the surface of a dish of water. What is most likely to happen if a drop of dish soap is added to the water?