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Describe vander val force?
Van de Waals forces are bonds formed when 2 slightly charged ends of the molecule bond together. Due to difference in electronegativity of atoms within the covalently bonded compound, different ends of the compound will gain slight charges (delta charges). The ends of the compound will react with compounds with the oppositely charged end.
Does heat expand rubber?
Whether a material expands or contracts when it is heated can be ascribed to a property of the material called its entropy. The entropy of a material is a measure of the orderliness of the molecules that make up the material. When the molecules are arranged in an ordered fashion, the entropy of the material is low. When the molecules are in a disordered arrangement, the entropy is high. (An ordered arrangement can be thought of as coins in a wrapper, while a disordered one as coins in a tray.) When a material is heated, its entropy increases because the orderliness of its molecules decreases. This occurs because as a material is heated, its molecules move about more energetically. In materials made up of small, compact molecules, e.g., the liquid in a thermometer, as the molecules move about more, they push their neighbouring molecules away. Rubber, on the other hand, contains very large, threadlike molecules. When rubber is heated, the sections of the molecules move about more vigorously. In order for one part of the molecule to move more vigorously as it is heated, it must pull its neighbouring parts closer. To visualize this, think of a molecule of the stretched rubber band as a piece of string laid out straight on a table. Heating the stretched rubber band causes segments of the molecules to move more vigorously, which can be represented by wiggling the middle of the string back and forth. As the middle of the string moves, the ends of the string get closer together. In a similar fashion, the molecules of rubber become shorter as the rubber is heated, causing the stretched rubber band to contract
Why oil does not dissolve in water?
Water dissolves substances because it's hydrogen bonds make it a polar molecule. Thus, the positive and negative ends of the water molecules attract the negative and positive ends (respectively) of substances, thus pulling them apart and dissolving the substance. Oil, however, is a nonpolar substance, so it is not attracted to the polarity of water.
What is a phosholipd bilayer?
A phospholipid bilayer is a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. Also called lipid bilayer.http://dictionary.infoplease.com/phospholipid-bilayer
Is it true When water dissolves sugar the positive ends of the water moecules are attracted to the negative ends of the sugar molecules?
Generally, when a molecule is dissolved in water, the process called hydration occurs. This process consists in the creation around the polar or ionic parts of the dissolved molecule of a shell of water molecules that are bonded to solute via polar bonds (called hydrogen bonds). This is a fundamental process in solution formation. As a matter of fact, it deeply influences the spontaneous solution formation by participating to the solution free energy and renders the water a very good solvent, differently from other liquids that are not able to form such bonds.
What are molecules that do not have opposite charged ends?
Molecules that do not have oppositely charged ends are nonpolar molecules.
Why do nonpolar molecules not have oppositely charged ends?
Nonpolar molecule is one which electrons are shared equally in bonds. Such a molecule does not have oppositely charged ends. This is true of molecules made from two identical atoms or molecules that are symmetric, such as CCl4.
Is a non polar molecules?
A nonpolar molecule is a molecule that shares electrons equally and does not have oppositely charged ends.
What molecule that has oppositely charged ends is called?
Those molecules are polar.
What is a weak bond between oppositely charged ends of two different molecules?
A weak bond between oppositely charged ends of two different molecules is known as an ion-dipole interaction or a dipole-dipole interaction, depending on the specific context. In ion-dipole interactions, an ion (either positive or negative) attracts the partial charges of a polar molecule, while dipole-dipole interactions occur between two polar molecules that have permanent dipoles. These interactions are generally weaker than covalent or ionic bonds but play a crucial role in the behavior of molecules in solutions and biological systems.
What property of water allows bicarbonate NaHCO3 to dissolve into solution?
The polar nature of water molecules allows for the dissolution of NaHCO3. Water molecules are able to surround and separate the individual Na+ and HCO3- ions, facilitating their dispersal throughout the solution. This process is driven by the attraction between the polar water molecules and the charged ions in NaHCO3.
Do polar molecules share electrons equally?
Nonpolar molecules are molecules that shares electrons equally and does not have oppositely charged ends. Polar molecules are molecules with a slightly positive end and a slightly negative end as a result of electrons being shared unequally.
None polar molecules?
Nonpolar molecules have a symmetrical distribution of charge, resulting in no significant difference in electronegativity between atoms. Examples of nonpolar molecules include hydrocarbons like methane (CH4), carbon dioxide (CO2), and diatomic gases like oxygen (O2) and nitrogen (N2).
A restriction enzyme is likely to cut which kind of molecules?
DNA molecules. A strand of DNA molecules can be cut to have blunted ends or jagged ends (sticky ends).
What is polar and non polar compound?
polar compounds are those which have charged ends or you can say those compound or molecules which have +ve ends and -ve ends in their structure . non polar are those which don't have any charged ends thee molecules are neutral in their configuration . polar molecules have strong force of attraction than non poalr molecules between them due to which thaey have high melting point and strength
What is a non polar?
A nonpolar molecule is a molecule that shares electrons equally and does not have oppositely charged ends.
What is a non - polar molecule?
A nonpolar molecule is a molecule that shares electrons equally and does not have oppositely charged ends.
