Welcome to 3FF3! Bio
... 3 H-bonds overcome the entropy of complex formation • **Note: In synthetic DNAs other interactions can occur ...
... 3 H-bonds overcome the entropy of complex formation • **Note: In synthetic DNAs other interactions can occur ...
Summer Work
... One way to cool down your cup of coffee is to plunge an ice-cold piece of aluminum into it. Suppose you store a 20.0 g piece of aluminum (Cp of Al = .902J/g•°C) in the refrigerator at 4.40 °C and then drop it into your coffee. The coffee temperature drops from 90.0 °C to 55.0 °C. How many joules of ...
... One way to cool down your cup of coffee is to plunge an ice-cold piece of aluminum into it. Suppose you store a 20.0 g piece of aluminum (Cp of Al = .902J/g•°C) in the refrigerator at 4.40 °C and then drop it into your coffee. The coffee temperature drops from 90.0 °C to 55.0 °C. How many joules of ...
Advanced Chemical Reactions
... BUT, if those molecules have a LARGE amount of energy, they can overcome the repulsion and react Molecules also must collide in the right orientation ...
... BUT, if those molecules have a LARGE amount of energy, they can overcome the repulsion and react Molecules also must collide in the right orientation ...
Chapter 14
... Chapter 14 Homework Solutions for Moore Problems # – 14, 18, 20, 24, 25, 28, 31, 33, 38 14. Strategy and Explanation: For the expression of the equilibrium constant, use this form: KC = [products]/[reactants]; if a stoichiometric coefficient precedes a species, that number is used as the mathematica ...
... Chapter 14 Homework Solutions for Moore Problems # – 14, 18, 20, 24, 25, 28, 31, 33, 38 14. Strategy and Explanation: For the expression of the equilibrium constant, use this form: KC = [products]/[reactants]; if a stoichiometric coefficient precedes a species, that number is used as the mathematica ...
Chapter 4: Chemical Reactions Elements can be characterized as
... Table 4-11 (List of common cations and anions) Binary molecular compounds (Mostly two nonmetals bonded together) Use Greek and Latin prefixes instead of Roman numerals and suffixes. Examples: SO2 – sulfur dioxide; SO3 – sulfur trioxide; As4O6 – tetraarsenic hexoxide Learn the common prefixes (pg. 14 ...
... Table 4-11 (List of common cations and anions) Binary molecular compounds (Mostly two nonmetals bonded together) Use Greek and Latin prefixes instead of Roman numerals and suffixes. Examples: SO2 – sulfur dioxide; SO3 – sulfur trioxide; As4O6 – tetraarsenic hexoxide Learn the common prefixes (pg. 14 ...
File - chemistryattweed
... and explosives. Much of the fertiliser originated in Chile, a long way from the industrial centres of Europe. It was known that the atmosphere contains large quantities of diatomic nitrogen. It would be advantageous to convert this readily available gas to usable compounds for agriculture and indust ...
... and explosives. Much of the fertiliser originated in Chile, a long way from the industrial centres of Europe. It was known that the atmosphere contains large quantities of diatomic nitrogen. It would be advantageous to convert this readily available gas to usable compounds for agriculture and indust ...
ap chemistry – 2013-2014
... AP CHEMISTRY – 2013-2014 Course Description: This AP Chemistry course is designed to be the equivalent of the general chemistry course usually taken during the first year of college. This course is structured around six big ideas that include: Structure of matter, properties of matter-characteristic ...
... AP CHEMISTRY – 2013-2014 Course Description: This AP Chemistry course is designed to be the equivalent of the general chemistry course usually taken during the first year of college. This course is structured around six big ideas that include: Structure of matter, properties of matter-characteristic ...
Chapter 3 Chemical Reactions
... achieved, the amount of each reactant and product remains constant. ...
... achieved, the amount of each reactant and product remains constant. ...
cbse class – x science solutions
... When wood is burnt in limited supply of oxygen, volatile materials are expelled. The residue left is called charcoal. Charcoal burns without smoke and has higher calorific value. In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of 55o with t ...
... When wood is burnt in limited supply of oxygen, volatile materials are expelled. The residue left is called charcoal. Charcoal burns without smoke and has higher calorific value. In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of 55o with t ...
Chem 12 UNIT TWO CHEMICAL EQUILIBRIUM 7.1 REVERSIBLE
... Recall the definition of Entropy. Entropy is the degree of disorder or randomness. The law of disorder states that a spontaneous reaction in an isolated system always proceeds in the direction of increasing entropy. (in text they give an example of Kits Beach - sodium and chloride ions will not form ...
... Recall the definition of Entropy. Entropy is the degree of disorder or randomness. The law of disorder states that a spontaneous reaction in an isolated system always proceeds in the direction of increasing entropy. (in text they give an example of Kits Beach - sodium and chloride ions will not form ...
Industrial Chemicals Technology Hand Book
... chemicals. Chemicals are used to make a wide variety of consumer goods, as well as thousands inputs to manufacturing, construction, and service industries. The applications of industrial chemical are in various fields like in organic chemicals, paint, varnishes, resins, petroleum, pigments, printing ...
... chemicals. Chemicals are used to make a wide variety of consumer goods, as well as thousands inputs to manufacturing, construction, and service industries. The applications of industrial chemical are in various fields like in organic chemicals, paint, varnishes, resins, petroleum, pigments, printing ...
Chemistry - El Camino College
... B. ______ - two or more different atoms chemically bonded together. C. Two major types of ______ join atoms: ionic and covalent bonds 1. ______ Bond - very strong attraction between negatively and positively charged ions a. In ionic reactions, atoms give or take _________ to get a full outer electro ...
... B. ______ - two or more different atoms chemically bonded together. C. Two major types of ______ join atoms: ionic and covalent bonds 1. ______ Bond - very strong attraction between negatively and positively charged ions a. In ionic reactions, atoms give or take _________ to get a full outer electro ...
Part II - American Chemical Society
... b. Would the A factor for the chemical reaction NO(g) + N2O(g) → NO2(g) + N2(g) be expected to be larger or smaller than the A factor in the above reaction if each reaction occurs in a single step? Outline your reasoning. c. Calculate the rate constant for this reaction at 75 ˚C. d. The following tw ...
... b. Would the A factor for the chemical reaction NO(g) + N2O(g) → NO2(g) + N2(g) be expected to be larger or smaller than the A factor in the above reaction if each reaction occurs in a single step? Outline your reasoning. c. Calculate the rate constant for this reaction at 75 ˚C. d. The following tw ...
Chemical reactions unit
... There are 6 factors that affect the rate of chemical reactions: 1. Increase in temperature: Why? The particles are moving faster and have more chances to collide into each other to make a reaction. 2. Increase in Surface area: Why? More of the substance is exposed, so the particles have more opportu ...
... There are 6 factors that affect the rate of chemical reactions: 1. Increase in temperature: Why? The particles are moving faster and have more chances to collide into each other to make a reaction. 2. Increase in Surface area: Why? More of the substance is exposed, so the particles have more opportu ...
Chemical reactions unit
... There are 6 factors that affect the rate of chemical reactions: 1. Increase in temperature: Why? The particles are moving faster and have more chances to collide into each other to make a reaction. 2. Increase in Surface area: Why? More of the substance is exposed, so the particles have more opportu ...
... There are 6 factors that affect the rate of chemical reactions: 1. Increase in temperature: Why? The particles are moving faster and have more chances to collide into each other to make a reaction. 2. Increase in Surface area: Why? More of the substance is exposed, so the particles have more opportu ...
Section 1 The Nature of Chemical Reactions
... Classifying Reactions, continued • A single-displacement reaction is a reaction in which one element or radical takes the place of another element or radical in the compound. • Single-displacement reactions have the following general form: AX + B → BX + A • Example: The single-displacement reaction ...
... Classifying Reactions, continued • A single-displacement reaction is a reaction in which one element or radical takes the place of another element or radical in the compound. • Single-displacement reactions have the following general form: AX + B → BX + A • Example: The single-displacement reaction ...
Pages from PS 11 Textbook for Lab
... be readily calculated. The convention is to define the standard enthalpy of formation, ΔH°f , to specific molecular species, and then tabulate those values of ΔH°f . Because enthalpy is a state function, we are concerned only with changes in enthalpy ΔH, so the absolute scale is not important in suc ...
... be readily calculated. The convention is to define the standard enthalpy of formation, ΔH°f , to specific molecular species, and then tabulate those values of ΔH°f . Because enthalpy is a state function, we are concerned only with changes in enthalpy ΔH, so the absolute scale is not important in suc ...
Lewis acid catalysis
In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the reactivity of a substrate. Common Lewis acid catalysts are based on main group metals such as aluminum, boron, silicon, and tin, as well as many early (titanium, zirconium) and late (iron, copper, zinc) d-block metals. The metal atom forms an adduct with a lone-pair bearing electronegative atom in the substrate, such as oxygen (both sp2 or sp3), nitrogen, sulfur, and halogens. The complexation has partial charge-transfer character and makes the lone-pair donor effectively more electronegative, activating the substrate toward nucleophilic attack, heterolytic bond cleavage, or cycloaddition with 1,3-dienes and 1,3-dipoles.Many classical reactions involving carbon–carbon or carbon–heteroatom bond formation can be catalyzed by Lewis acids. Examples include the Friedel-Crafts reaction, the aldol reaction, and various pericyclic processes that proceed slowly at room temperature, such as the Diels-Alder reaction and the ene reaction. In addition to accelerating the reactions, Lewis acid catalysts are able to impose regioselectivity and stereoselectivity in many cases.Early developments in Lewis acid reagents focused on easily available compounds such as TiCl4, BF3, SnCl4, and AlCl3. The relative strengths of these (and other) Lewis acids may be estimated from NMR spectroscopy by the Childs method or the Gutmann-Beckett method. Over the years, versatile catalysts bearing ligands designed for specific applications have facilitated improvement in both reactivity and selectivity of Lewis acid-catalyzed reactions. More recently, Lewis acid catalysts with chiral ligands have become an important class of tools for asymmetric catalysis.Challenges in the development of Lewis acid catalysis include inefficient catalyst turnover (caused by catalyst affinity for the product) and the frequent requirement of two-point binding for stereoselectivity, which often necessitates the use of auxiliary groups.