Decide whether each scenario describes intermolecular forces or intramolecular forces. A polar covalent bond joins the hydrogen and
nitrogen atoms in ammonia (NH3).

a. intramolecular
b. intermolecular

Intramolecular

The follow up answer for "The two strands of a DNA molecule are separate molecules that are held together by weak electrostatic attractions." is Intermolecular.

The next answer is Intermolecular

For the first: Intra

Second: Inter

For the last: Inter

Explanation:

For edge:)

50.23 i believe is correct but don't quote me on that.