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Why does the hydrophilic phosphate head of the phospholipid not prevent the movement of non-polar molecules? So only hydrophobic (nonpolar), gases, and small particles (nonpolar) can pass through. Making statements based on opinion; back them up with references or personal experience.

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Mar 27, 2011 · Hydrocarbon molecules are made of a carbon backbone with hydrogen attachments. Based on electronegativity, neither of these elements create polarity (electrons being pulled towards one pole). When you have a large difference in electronegativity (O-H) then you create polarity.

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Question 9. Draw the cis- and trans-structures for hex-2-ene. Which iosmer will have higher b.p. and why? Answer: The structures of cis- and trans-isomer of hex-2-ene are: The boiling point of a molecule depends upon dipole-dipole interactions. Since cis-isomer has higher dipole moment, therefore, it has higher boiling point. Question 10.
When rubber and petroleum are refined, the non-polar fractions are isolated. Consider a polymer molecule in solution: it is there because being in solution is easier (requires less energy) than not being in solution. This is because the molecules are similar; i.e., like dissolves like--their polarities are similar.
Fatty acids are merely carboxylic acids with long hydrocarbon chains. The hydrocarbon chain length may vary from 10-30 carbons (most usual is 12-18). The non-polar hydrocarbon alkane chain is an important counter balance to the polar acid functional group.
Molecules in the liquid state too have kinetic energy but they cannot go very far away because of the larger forces of attraction amongst them. Due to this feature, liquids have definite volume, but they do not have definite shape. They take the shape of the vessel in which they are placed.
Why are the molecules of hydrocarbons nonpolar? Electronegativity: Eletronegativity describes the relative attraction of an atom for a pair of shared electrons in a covalent bond.
Water molecules are naturally attracted and stick to each other like magnets. B. Language has the capacity to change the world and the way we live in it. People are often afraid to call things by their direct names, use taboos not to notice dangerous tendencies.
1. Based on their structures, rank phenol, benzene, benzaldehyde, and benzoic acid in terms of lowest to highest boiling point. Solution. By thinking about noncovalent intermolecular interactions, we can also predict relative melting points. All of the same principles apply: stronger intermolecular interactions result in a higher melting point.
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Sep 27, 2017 · The researchers built upon their earlier studies, making and separating the two mirror images of helicene molecules. This time they changed their structure to include a new sulfur-containing group.
  • 9. Why are the molecules of a liquid much closer together than those of a gas? 1. Solid bodies have the property of keeping their shape without supporting of a vessel. 2. Upon being heated, the molecules begin moving very quickly. 3. If two glass rods are charged by rubbing them with silk, it is...
  • A glycerol molecule is made up of three carbon atoms with a hydroxyl group attached to it and Classification (Types) of Lipids. Lipids can be classified according to their hydrolysis products and They may also be glyceroglycolipids or sphingoglycolipid depending upon the alcohol group present...
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  • (CHX4 ) are non-polar because their symmetric shapes cancel out the dipole moments to zero, as shown in the figure below. Understanding the electron pair and molecular geometries described in the valence shell electron pair repulsion (vsper) model is useful in predicting the polarity of molecules.
  • Aug 01, 2019 · Small polar molecules such as water of H2O can pass but very slowly. They are usually assisted through facilitated diffusion such as with osmosis. Large nonpolar molecules such as benzene are very slow in passing through. The larger the nonpolar molecule, the slower it can pass through the membrane.
  • ...are large molecules composed of thousands of covalently connected atoms • Molecular structure and mostly of hydrocarbons, which form nonpolar covalent bonds • The most biologically important lipids are 55. • The major function of fats is energy storage • Humans and other mammals store their fat in 129. • Nucleoside = nitrogenous base + sugar • There are two families of nitrogenous bases...
  • Fatty acids are merely carboxylic acids with long hydrocarbon chains. The hydrocarbon chain length may vary from 10-30 carbons (most usual is 12-18). The non-polar hydrocarbon alkane chain is an important counter balance to the polar acid functional group.
  • Slide$9$ While$plants$can$make$structural$polysaccharides$(including$cellulose),$animals$can$make$their$own$ versions$of$structural$polysaccharides,$includingchitin ...
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Write the chemical equation for the overall process of cellular respiration quizlet