Organic - NUS Chemistry
... Prerequisite: 'A' level pass in chemistry or equivalent or CM1417 [CM1417 (can only be used for Life Science majors)] Preclusion: CM1501 or GEK1516 The module deals primarily with the basic principles to understand the structure and reactivity of organic molecules. Emphasis is on substitution and el ...
... Prerequisite: 'A' level pass in chemistry or equivalent or CM1417 [CM1417 (can only be used for Life Science majors)] Preclusion: CM1501 or GEK1516 The module deals primarily with the basic principles to understand the structure and reactivity of organic molecules. Emphasis is on substitution and el ...
Solution Preparation Final Goueth
... 29. When FeCl3 is ignited in an atmosphere of pure oxygen, this reaction takes place. 4 FeCl3(s) + 3 O2 (g) ---> 2 Fe2O3(s) + 6 Cl2 (g) If 3.0 mol of FeCl3 are ignited in the presence of 2.0 mol of O2 gas, how much of which reagent is present in excess and therefore remains unreacted? (A) 0.33 mol F ...
... 29. When FeCl3 is ignited in an atmosphere of pure oxygen, this reaction takes place. 4 FeCl3(s) + 3 O2 (g) ---> 2 Fe2O3(s) + 6 Cl2 (g) If 3.0 mol of FeCl3 are ignited in the presence of 2.0 mol of O2 gas, how much of which reagent is present in excess and therefore remains unreacted? (A) 0.33 mol F ...
Unit 5 Chemical Kinetics Section 5.1 Rates of Chemical Reaction
... temperature increases the number of reactant particles having energy greater than the activation energy of the reaction, thus producing more fruitful collisions. Moreover, the increase in temperature also increases the average kinetic energy of the particles. This will result in higher velocities of ...
... temperature increases the number of reactant particles having energy greater than the activation energy of the reaction, thus producing more fruitful collisions. Moreover, the increase in temperature also increases the average kinetic energy of the particles. This will result in higher velocities of ...
chem 13 news 2010 - University of Waterloo
... 36 How many unpaired electrons are there in a Mn2+ ion in its ground electronic state? The atomic number of manganese is Z = 25. ...
... 36 How many unpaired electrons are there in a Mn2+ ion in its ground electronic state? The atomic number of manganese is Z = 25. ...
Thermodynamics
... bond breaks and the two CH2 ✂ groups are linked with C ✂ C single bonds thus forming three single bonds (two single bonds are formed when each CH2 ✂ group of ethylene links with one CH2 ✂ group of another ethylene molecule). But in the whole unit of polymer, number of single C ✂ C bonds formed/mole ...
... bond breaks and the two CH2 ✂ groups are linked with C ✂ C single bonds thus forming three single bonds (two single bonds are formed when each CH2 ✂ group of ethylene links with one CH2 ✂ group of another ethylene molecule). But in the whole unit of polymer, number of single C ✂ C bonds formed/mole ...
fahad h. ahmad - Fahad`s Academy
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
... 1. Ionic compounds are hard crystalline solids with flat sides and regular shapes because the ions are arrnged in straight rows in strong ionic bonds. 2. Ionic compounds have very high melting points and boiling points. 3. The strong forces holding ionic compounds prevents them to evaporate easily. ...
2010 `A` Levels Suggested Solutions
... This reaction is unusual as you’ve been taught that alcohols are neutral. But note that the use of conc HCl is to remove the organic impurity that cannot be separate by Step 5. The ONLY organic reactant used is butan-1-ol making it the only possible candidate as the organic impure that the question ...
... This reaction is unusual as you’ve been taught that alcohols are neutral. But note that the use of conc HCl is to remove the organic impurity that cannot be separate by Step 5. The ONLY organic reactant used is butan-1-ol making it the only possible candidate as the organic impure that the question ...
Answers to Selected Questions and Problems
... The molecules in image A have greater kinetic energy because they are moving faster. Any object that would move if allowed has potential energy (e.g., a picture hanging on a wall). The people walking, the wheel chair rolling, and the suitcase being pushed all have kinetic energy. The people, the wal ...
... The molecules in image A have greater kinetic energy because they are moving faster. Any object that would move if allowed has potential energy (e.g., a picture hanging on a wall). The people walking, the wheel chair rolling, and the suitcase being pushed all have kinetic energy. The people, the wal ...
Insertion of Rhodium into the Carbon
... in Scheme I . An initial reaction with D M A D occurs at 25 OC, and the major product (60%) of the reaction is identified as the Diels-Alder adduct 5 in which PMe3 has been displaced internally by an olefin. Other products identified in this reaction include ...
... in Scheme I . An initial reaction with D M A D occurs at 25 OC, and the major product (60%) of the reaction is identified as the Diels-Alder adduct 5 in which PMe3 has been displaced internally by an olefin. Other products identified in this reaction include ...
Types of Reactions
... The molecular equation lists all species in their molecular forms: Pb(NO3)2 (aq) + 2 KI (aq) PbI2 (s) + 2 KNO3 (aq) The complete ionic equation lists all strong soluble electrolytes in the reaction as ions: Pb2+(aq) + 2 NO3–1 (aq) + 2 K+1 (aq) + 2I–1 (aq) PbI2 (s) + 2K+1 (aq) + 2 NO3–1 (aq) • On ...
... The molecular equation lists all species in their molecular forms: Pb(NO3)2 (aq) + 2 KI (aq) PbI2 (s) + 2 KNO3 (aq) The complete ionic equation lists all strong soluble electrolytes in the reaction as ions: Pb2+(aq) + 2 NO3–1 (aq) + 2 K+1 (aq) + 2I–1 (aq) PbI2 (s) + 2K+1 (aq) + 2 NO3–1 (aq) • On ...
AP Chemistry
... in acid. When the chemical reaction had progressed as completely as possible, the amount of unreacted (excess) Cr2O72- was determined by titrating the solution with 0.110 M Fe(NO3)2. The reaction that occurred during the titration is represented by the balanced equation: 6 Fe2+ + Cr2O72- + 14 H+ 2 ...
... in acid. When the chemical reaction had progressed as completely as possible, the amount of unreacted (excess) Cr2O72- was determined by titrating the solution with 0.110 M Fe(NO3)2. The reaction that occurred during the titration is represented by the balanced equation: 6 Fe2+ + Cr2O72- + 14 H+ 2 ...
Chapter 17 - Cengage Learning
... The collision model says that in order for molecules to react with each other, they must first collide. Increases in the temperature and concentration of reactants bring about more collisions, and the rate of reaction increases. The collision model explains many observations about reactions. Not all ...
... The collision model says that in order for molecules to react with each other, they must first collide. Increases in the temperature and concentration of reactants bring about more collisions, and the rate of reaction increases. The collision model explains many observations about reactions. Not all ...
www.fahadsacademy.com
... The valence electrons is the number of electrons of the outermost shell. Sulphur has 6 valence electrons. Relation with Periodic Table Elements in same horizontal row: Period Elements in same vertical column: Group Group 1 has 1 valency, Group 2 has 2 valency, Group 3 has 3 valency and so on. Group ...
... The valence electrons is the number of electrons of the outermost shell. Sulphur has 6 valence electrons. Relation with Periodic Table Elements in same horizontal row: Period Elements in same vertical column: Group Group 1 has 1 valency, Group 2 has 2 valency, Group 3 has 3 valency and so on. Group ...
Structures of Escherichia coli Branched
... ABSTRACT: The following three-dimensional structures of three forms of Escherichia coli branched-chain amino acid aminotransferase (eBCAT) have been determined by the X-ray diffraction method: the unliganded pyridoxal 5′-phosphate (PLP) form at a 2.1 Å resolution, and the two complexes with the subs ...
... ABSTRACT: The following three-dimensional structures of three forms of Escherichia coli branched-chain amino acid aminotransferase (eBCAT) have been determined by the X-ray diffraction method: the unliganded pyridoxal 5′-phosphate (PLP) form at a 2.1 Å resolution, and the two complexes with the subs ...
Problem 5. The Second Law of thermodynamics
... kJ·mol–1. The ordinate is log p = 1.2. The ratio of the lengths of the line segments from this point to the borders of the phase coexistence curve (blue and red line segments in the figure below) is equal to the ratio of the number of moles of methane in vapor and liquid phases. One can find that ab ...
... kJ·mol–1. The ordinate is log p = 1.2. The ratio of the lengths of the line segments from this point to the borders of the phase coexistence curve (blue and red line segments in the figure below) is equal to the ratio of the number of moles of methane in vapor and liquid phases. One can find that ab ...
Topic 5 Energetics File
... gaseous atom into its constituent gaseous atoms. Born-Haber cycle: Energy cycles for the formation of ionic compounds. If there is little agreement between the theoretical and experimental values, this could indicate a degree of covalent character. Electron affinity: Enthalpy change when an electron ...
... gaseous atom into its constituent gaseous atoms. Born-Haber cycle: Energy cycles for the formation of ionic compounds. If there is little agreement between the theoretical and experimental values, this could indicate a degree of covalent character. Electron affinity: Enthalpy change when an electron ...
Problem 5. The Second Law of thermodynamics
... kJ·mol–1. The ordinate is log p = 1.2. The ratio of the lengths of the line segments from this point to the borders of the phase coexistence curve (blue and red line segments in the figure below) is equal to the ratio of the number of moles of methane in vapor and liquid phases. One can find that ab ...
... kJ·mol–1. The ordinate is log p = 1.2. The ratio of the lengths of the line segments from this point to the borders of the phase coexistence curve (blue and red line segments in the figure below) is equal to the ratio of the number of moles of methane in vapor and liquid phases. One can find that ab ...
Mechanochemistry: the varied applications of mechanical bond
... were cracked by breaking of intermolecular cohesive ligations producing very high surface area for the solid-solid reaction with equally micronized reagent crystallites or with liquids. A fair reactivity comparison for solid-liquid reactions would be the use of pre-milled C60 for the reaction with t ...
... were cracked by breaking of intermolecular cohesive ligations producing very high surface area for the solid-solid reaction with equally micronized reagent crystallites or with liquids. A fair reactivity comparison for solid-liquid reactions would be the use of pre-milled C60 for the reaction with t ...
380 KB / 39 pages
... dimethylglyoxime anions, so the ionic compound must be Ni(dmg)2. Note that this result also tells us that each dimethylglyoxime anion must have a charge of –1 in order to balance the cationic charge. When you analyzed the data in Check This 6.11, you probably focused on the sample that produced the ...
... dimethylglyoxime anions, so the ionic compound must be Ni(dmg)2. Note that this result also tells us that each dimethylglyoxime anion must have a charge of –1 in order to balance the cationic charge. When you analyzed the data in Check This 6.11, you probably focused on the sample that produced the ...
Chapter 2 Geochemical Reactions
... electrostatic attraction of the opposite charges, and this is an ionic bond. Halite — NaCl is the most common example of ionic bonding, where Na+ has shed its outer orbit electron and Cl– has gained an electron to fill its outer orbit. Ionic bonds are weak, and such minerals have high solubilities. ...
... electrostatic attraction of the opposite charges, and this is an ionic bond. Halite — NaCl is the most common example of ionic bonding, where Na+ has shed its outer orbit electron and Cl– has gained an electron to fill its outer orbit. Ionic bonds are weak, and such minerals have high solubilities. ...
2005/6 - SAASTA
... aqueous systems, the hydrogen ion activity is dictated by the dissociation constant of water (Kw = 1.011 × 10−14 M2 at 25 °C) and interactions with other ions in solution. Due to this dissociation constant, a neutral solution (hydrogen ion activity equals hydroxide ion activity) has a pH of approxim ...
... aqueous systems, the hydrogen ion activity is dictated by the dissociation constant of water (Kw = 1.011 × 10−14 M2 at 25 °C) and interactions with other ions in solution. Due to this dissociation constant, a neutral solution (hydrogen ion activity equals hydroxide ion activity) has a pH of approxim ...
Can the (M• – X) region in electron capture dissociation provide
... Phenolic compounds behave like acids whereas alcohols act more often as bases. The proton affinities increase when going from water (724 kJ mol–1) towards more and more substituted alcohols [for example, PA(t-BuOH) = ...
... Phenolic compounds behave like acids whereas alcohols act more often as bases. The proton affinities increase when going from water (724 kJ mol–1) towards more and more substituted alcohols [for example, PA(t-BuOH) = ...
x - A Level Tuition
... The presence of the two electron withdrawing CO group helps to disperse the negative charge on the anion / the negative charge of the anion formed from deprotonation can be delocalised with the pi electron system of the two CO groups. This stabilises the anion, making it acidic. ...
... The presence of the two electron withdrawing CO group helps to disperse the negative charge on the anion / the negative charge of the anion formed from deprotonation can be delocalised with the pi electron system of the two CO groups. This stabilises the anion, making it acidic. ...
xy3-allyl Benzoic Acid, CsHa(COOH)1(OW)2(CsH6)3.---Thi
... A possible alternative which might be considered is that the action takes place in two steps: First, due to the effect of zinc chloride, the alcoholic group is replaced by chlorine. Second, a reaction similar to that of F'riedel and Crafts takes place giving the final product. This explanation i s ...
... A possible alternative which might be considered is that the action takes place in two steps: First, due to the effect of zinc chloride, the alcoholic group is replaced by chlorine. Second, a reaction similar to that of F'riedel and Crafts takes place giving the final product. This explanation i s ...