Water, pH and Macromolecules
A compound that is capable of forming hydrogen bonds with water

should act as a good buffer for acids and bases
is probably held together by noncovalent bonds
does not dissolve well in water
contains at least some polar covalent bonds

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Water, pH and Macromolecules
Which of the following statements about covalently bonded molecules is false?

Noncovalent bonds may also be present, especially if the molecule is large
The chemical bonds that hold the molecule together are relatively strong
Such molecules often result from the interaction of ionized atoms
Electrons are shared between the atoms that make up the molecule

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Water, pH and Macromolecules
Hydrogen bonds and hydrophilic interactions are types of

weak chemical bonds that hold together the atoms within a molecule
strong chemical bonds that link together separate molecules
weak chemical bonds that link together separate molecules
strong chemical bonds that hold together the atoms within a molecule

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Water, pH and Macromolecules
Salt dissolves well in water as water molecules

make nonpolar covalent bonds with the positively charged ions only
surround the ions because of their charge but do not form hydrogen bonds
share electrons with the ions to make polar covalent bonds
form hydrogen bonds with the positively and negatively charged ions

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