It is known that chlorine is more electronegative than bromine, and thus chlorine is more reactive, and less discriminatory as to what it will react with, thus making bromine more “selective”. Another pertinent piece of information to look at would be stability. The stability of a free radical increases as the number of carbon substituents increases. Therefore, primary is the least stable and tertiary is the most stable. Also, the more stable the free radical that is left behind, the weaker its C-H bond strength will be.
D) the absence of charged molecules inside cells. Answer: C Page Ref: Section 3 11) The ________ pressure is the pressure required to prevent the flow of solvent through a solvent-permeable membrane that separates two solutions of different solute concentration. A) hydrostatic B) electromotive Answer: C Page Ref: Section 3 12 C) osmotic D) partial 12) Which is true about the solubility of electrolytes in water? A) They are all insoluble in water. B) They are usually only sparingly soluble in water.
On the other hand covalent bonds, the intermolecular forces are very weak and is easily broken,hence lesser heat is required and thus covalent bonds have lower melting and boiling points. Do ionic compounds conduct electricity as: (3 points) Solids? No Liquids? Yes Aqueous solutions (when the ionic compounds are dissolved in water)? Yes Do covalent compounds conduct electricity as: (3 points) Solids?
However, in covalent bonds, the intermolecular forces are very weak and easily broken, hence lesser heat is required and thus covalent bonds have lower melting and boiling points. http://www.diffen.com/difference/Covalent_Bonds_vs_Ionic_Bonds 1. Do ionic compounds conduct electricity as: (3 points) 1. Solids? No 2.
While hydrogen bonds have a uniquely high surface tension, van der Waals forces have a relatively weak attraction, which causes low surface tension. According to an author of Chem Guide, Jim Clark, in van der Waals forces, “the electrons are mobile, and at any one instant they might find themselves towards one end of the molecule, making that end slightly positive” (2000). In other words, oil is NOT a polar molecule like water, which causes the molecules to not stick to each other as well. The reason tension would occur is because the
Even though the results under hexane and toluene are similar, the distances of original mixture, first and second fraction are different from hexane and toluene solvent because they have different polarity. As first fraction containing fluorene, which is much non-polar than fluoreone, fluorene in first fraction is much easier to carry by the moving non-polar solvent. Thurs, as the more non-polar the solvent is the longer distance that fluorene will move. Since hexane has larger non-polar carbon-hydrogen single bond groups than toluene, it is much non-polar than toluene. As the result of this, it can explain why the distance of fluorine in hexane is longer (1.3 cm) than the one in toluene (0.5 cm) and due to less non polar toluene has.
(With resistance) Air: with resistance, syringe A can still be pushed a little towards syringe B. this is because particles in air are spread out; there are room in between to particles. That is why when syringe A is pressed down, the particles compressed together tightly causing the syringe to move a little before the particles were impacted too tightly for the syringe to move Water: water particles are different from gas particles. Water has very little compressibility. Particles in water are much more compacted together, therefore giving no space for them to compress more. This is the reason why with resistance, syringe A will not move as the particles in water are as tightly compressed together as they can get.
At constructive boundaries where plates are moving apart from one another, basaltic lava is erupted between the gaps. This type of lava is not very viscous due to its low silica content. This is because no subduction of crust is involved so the lava is not made of melted lithosphere but has risen from the mantle itself. The low viscosity of this lava causes it to flow very far before cooling and solidifying. This forms shield volcanoes with very gentle slopes and a much wider base than more conical shaped volcanoes involved with convergent plate margins.
Passive transport processes: Diffusion Diffusion is the movement of ions or molecules from regions of high to low concentration; down a concentration gradient. Diffusion and the plasma membrane The plasma membrane is semipermeable which means it will allow certain substances to go in and out but not others. Moecules that pass through the phospholipid bilayer easily: Hydrophobic molecules: 02 and N2 Non-polar: Benzene Small uncharged polar molecules: H20, Urea, glycerol and CO2 Molecules that don’t pass through the phospholipid bilayer easily: Large uncharged molecules: Glucose Polar molecules: Sucrose Ions (charged): H+, Na+, HCO3, K+Ca2+, Cl- and Mg2+ Therefore the three characteristics of a molecule that determine their permeability through the membrane are: 1. Polarity- Hydrophobic vs Hydrophilic 2. Charge- Charged vs Uncharged 3.
The standardization of of KMnO4 solution with Na2C2O4 is as follows: Oxidation: Na2C2O4→2Na++2CO2+2e- Reduction: KMnO4+8H++5e-→K++Mn+2+4H2O And the overall balanced equation: 16H++5Na2C2O4+ 2KMnO4→10Na++2CO2 These reactions are thermodynamically spontaneous, but the final one is susceptible to a side reaction and it is naturally very kinetically slow (Blandamer et al. 1998). The MnO2 present in the reaction in KMnO4 must be filtered to remove it because it interferes with the