Podcast
Questions and Answers
What characteristic distinguishes non-polar compounds from polar ones?
What characteristic distinguishes non-polar compounds from polar ones?
- Non-polar compounds have an ionic bond structure.
- Non-polar compounds have higher boiling points than polar compounds.
- Non-polar compounds have strong hydrogen bonds.
- Non-polar compounds do not dissolve in water. (correct)
Which of the following substances is likely to be classified as non-polar?
Which of the following substances is likely to be classified as non-polar?
- Water
- Ethanol
- Hexane (correct)
- Ammonium chloride
Which property is typically associated with non-polar molecules?
Which property is typically associated with non-polar molecules?
- Formation of strong hydrogen bonds
- High electronegativity differences
- Solubility in polar solvents
- Uniform electron distribution (correct)
Which of the following scenarios best illustrates the behavior of non-polar substances?
Which of the following scenarios best illustrates the behavior of non-polar substances?
Which of these statements is true regarding the molecular structure of non-polar compounds?
Which of these statements is true regarding the molecular structure of non-polar compounds?
Flashcards
Nonpolar molecule
Nonpolar molecule
A molecule with no overall charge, and electrons are distributed evenly.
Polar molecule
Polar molecule
A molecule with a positive and a negative end, due to uneven electron distribution.
Hydrogen bond
Hydrogen bond
A weak attraction between a hydrogen atom of one molecule and a highly electronegative atom (like oxygen or nitrogen) of another molecule.
Covalent bond
Covalent bond
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Water molecule
Water molecule
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Study Notes
Amino Acid Structures
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Bases: Arginine (Arg, R), Histidine (His, H), Lysine (Lys, K) are shown with their chemical structures. Arginine and Lysine have positively charged amino groups (+NH3). Histidine has a positively charged amino group and a potentially charged imidazole ring.
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Aromatic: Tyrosine (Tyr, Y), Phenylalanine (Phe, F), and Tryptophan (Trp, W) are displayed with their chemical structures. These contain aromatic rings.
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Amides: These structures are not named but are displayed with functional groups.
Nonpolar Amino Acids
- Alkyl: The structures with Alkyl chain are displayed
Other Amino Acids
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Polar and uncharged: Structures of Isoleucine (Ile, I), Leucine (Leu, L), Proline (Pro, P), with amino acid structures displayed
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Sulfur-containing: Displayed in structure with cysteine (Cys, C). Structures for methionine (Met, M).
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Alcohols: Displayed structures for Serine (Ser, S)
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Acids: Displayed structures for Aspartic Acid (Asp, D), and Glutamic Acid (Glu, E).
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Chemical formulas and names: Threonine (Thr, T) structures are shown. General amino acid structure is displayed.
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