Water, pH and Macromolecules Polyprotic acids such as H3PO4, can act as acid-base buffers if their concentration is kept low at pH values around neutrality only in combination with polyprotic bases at pH values around any of their pKa's if their concentration is kept low at pH values around neutrality only in combination with polyprotic bases at pH values around any of their pKa's ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The lone pair electrons on oxygen in a H20 molecule are not important for the properties of water form covalent bonds in ice carry a partial positive charge carry a partial negative charge are not important for the properties of water form covalent bonds in ice carry a partial positive charge carry a partial negative charge ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following statements about covalently bonded molecules is false? Such molecules often result from the interaction of ionized atoms Noncovalent bonds may also be present, especially if the molecule is large The chemical bonds that hold the molecule together are relatively strong Electrons are shared between the atoms that make up the molecule Such molecules often result from the interaction of ionized atoms Noncovalent bonds may also be present, especially if the molecule is large The chemical bonds that hold the molecule together are relatively strong Electrons are shared between the atoms that make up the molecule ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The elements oxygen, nitrogen, and carbon All of these are common elements in the molecules that make up living organisms contain protons and neutrons in their atomic nuclei can all form covalent bonds with other elements All of these are common elements in the molecules that make up living organisms contain protons and neutrons in their atomic nuclei can all form covalent bonds with other elements ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules A compound that is capable of forming hydrogen bonds with water contains at least some polar covalent bonds is probably held together by noncovalent bonds does not dissolve well in water should act as a good buffer for acids and bases contains at least some polar covalent bonds is probably held together by noncovalent bonds does not dissolve well in water should act as a good buffer for acids and bases ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The reactions of molecules require an enzyme in all cases are the reactions of the functional groups are independent of the functional groups All of these require an enzyme in all cases are the reactions of the functional groups are independent of the functional groups All of these ANSWER DOWNLOAD EXAMIANS APP
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