Harvard University General Chemistry Practice Problems “The
... 1. Start with 100. mL of 0.100 M BaCl2 2. Add 50. mL of 0.100 M AgNO3 ; a precipitate of AgCl is formed. 3. Add 50. mL of 0.100 M H2 SO4 ; a precipitate of BaSO4 is formed. 4. Finally, add 250. mL of 0.100 M NH3 to neutralize the acid. Determine the concentrations of each of the following species in ...
... 1. Start with 100. mL of 0.100 M BaCl2 2. Add 50. mL of 0.100 M AgNO3 ; a precipitate of AgCl is formed. 3. Add 50. mL of 0.100 M H2 SO4 ; a precipitate of BaSO4 is formed. 4. Finally, add 250. mL of 0.100 M NH3 to neutralize the acid. Determine the concentrations of each of the following species in ...
Purification and Characterization of
... grown in an artificial seawater medium (McIntosh and Cattolico, 1978) at 20°C on a 12-h light/12-h dark diel cycle. Cultures of 1 L were maintained in 2.8-L Fernbach flasks with continuous shaking at 60 rpm. Cultures were illuminated with cool-white fluorescent lamps at an intensity of 20 mE m22 s21 ...
... grown in an artificial seawater medium (McIntosh and Cattolico, 1978) at 20°C on a 12-h light/12-h dark diel cycle. Cultures of 1 L were maintained in 2.8-L Fernbach flasks with continuous shaking at 60 rpm. Cultures were illuminated with cool-white fluorescent lamps at an intensity of 20 mE m22 s21 ...
Characters of Chymosin Gene Isolated from Different Animal A. G. Attallah
... chymosin with molecular weight of 23 kDa has been reported [1 8 ]. These results, however, were not based on advanced separation techniques, which might explain the discrepancy. A similar electrophoretic heterogeneity of bovine calf chymosin was reported by Donnelly[3 ] and Foltmann [4 ] due to the ...
... chymosin with molecular weight of 23 kDa has been reported [1 8 ]. These results, however, were not based on advanced separation techniques, which might explain the discrepancy. A similar electrophoretic heterogeneity of bovine calf chymosin was reported by Donnelly[3 ] and Foltmann [4 ] due to the ...
Engineering subunit association of multisubunit proteins
... that prevents the formation of the natural tetramer. However, the high hydrophobicity of the dimer–dimer interface, which would be exposed to solvent in a dimeric streptavidin, suggests that the resulting molecule would have very low solubility in aqueous media. In agreement with the calculations, a ...
... that prevents the formation of the natural tetramer. However, the high hydrophobicity of the dimer–dimer interface, which would be exposed to solvent in a dimeric streptavidin, suggests that the resulting molecule would have very low solubility in aqueous media. In agreement with the calculations, a ...
Chemistry – A Molecular Sciences Appendices
... Comment: Note that the two calculations are almost identical, the only difference being the term that converts moles of H2O to moles of H in part b. This extra step was necessary because we are “counting” hydrogen atoms, not water molecules. The conversion factor comes directly from the chemical for ...
... Comment: Note that the two calculations are almost identical, the only difference being the term that converts moles of H2O to moles of H in part b. This extra step was necessary because we are “counting” hydrogen atoms, not water molecules. The conversion factor comes directly from the chemical for ...
29 Sept 08 - Seattle Central
... • What if we wanted to know the number of moles of H2 and O2 produced from the decomposition of 5.8 mol of H2O? 2H2O(l) 2H2(g) + O2(g) • We know the following: ...
... • What if we wanted to know the number of moles of H2 and O2 produced from the decomposition of 5.8 mol of H2O? 2H2O(l) 2H2(g) + O2(g) • We know the following: ...
Document
... We need the mole because the mass of an atom is too small to be measured on a balance. Remember: 1 amu = 1.6 x 10-24 g. 1 mole of anything: ...
... We need the mole because the mass of an atom is too small to be measured on a balance. Remember: 1 amu = 1.6 x 10-24 g. 1 mole of anything: ...
Chemistry Basics - Mr. Grays Physical Science Class
... it. When we say that water is "wet", or that silver is "shiny", we are describing materials in terms of their properties. Properties can be divided into the categories of physical properties and chemical properties. Physical properties are readily observable, like; color, size, luster, or smell. Che ...
... it. When we say that water is "wet", or that silver is "shiny", we are describing materials in terms of their properties. Properties can be divided into the categories of physical properties and chemical properties. Physical properties are readily observable, like; color, size, luster, or smell. Che ...
Chapter 3
... The formula of a compound indicates the number of atoms of each element in a unit of the compound. From a molecular or empirical formula, we can calculate what percent of the total mass is contributed by each element in a compound. A list of the percent by mass of each element in a compound is known ...
... The formula of a compound indicates the number of atoms of each element in a unit of the compound. From a molecular or empirical formula, we can calculate what percent of the total mass is contributed by each element in a compound. A list of the percent by mass of each element in a compound is known ...
Physical Chemistry 3: — Chemical Kinetics
... • Atoms and molecules localized on fixed lattice positions. • Reaction rate is determined by rate of diffusion (“hopping”) of the atoms and molecules via vacancies (unoccupied lattice positions, “Fehlstellen”) or interstitial sites (“Zwischengitterplätze”). • Hopping from one lattice position to anot ...
... • Atoms and molecules localized on fixed lattice positions. • Reaction rate is determined by rate of diffusion (“hopping”) of the atoms and molecules via vacancies (unoccupied lattice positions, “Fehlstellen”) or interstitial sites (“Zwischengitterplätze”). • Hopping from one lattice position to anot ...
Chemistry 121: Topic 2 - From Atoms to Stoichiometry Topic 2
... ¾ An Extensive Property is a property that depends on how much matter is being examined ie., mass ¾ An Intensive Property is a property that does not depend on how much matter is being examined ie., density ...
... ¾ An Extensive Property is a property that depends on how much matter is being examined ie., mass ¾ An Intensive Property is a property that does not depend on how much matter is being examined ie., density ...
Chemistry (Revised)
... 2 For this section of the examination you must use an HB pencil and, where necessary, an eraser. 3 Check that the answer sheet you have been given has your name, date of birth, SCN (Scottish Candidate Number) and Centre Name printed on it. Do not change any of these details. 4 If any of thi ...
... 2 For this section of the examination you must use an HB pencil and, where necessary, an eraser. 3 Check that the answer sheet you have been given has your name, date of birth, SCN (Scottish Candidate Number) and Centre Name printed on it. Do not change any of these details. 4 If any of thi ...
Chemistry 1250 - Sp17 Solutions for Midterm 1
... throughout. These are often referred to as solutions. Gases dissolve in each other to form solutions and gases dissolve in liquids to form solutions. Heterogeneous mixtures have physical and chemical properties that are NOT uniform throughout the sample. Heterogeneous mixtures may contain elements a ...
... throughout. These are often referred to as solutions. Gases dissolve in each other to form solutions and gases dissolve in liquids to form solutions. Heterogeneous mixtures have physical and chemical properties that are NOT uniform throughout the sample. Heterogeneous mixtures may contain elements a ...
Teaching with CAChe - Photochemical Dynamics Group
... traditional format for this workbook. We have tried to provide complete details so others can see at least one model for implementing modeling exercises. However, we urge you to consult the references, especially to the laboratory portions of the exercises. We did not attempt to give details on safe ...
... traditional format for this workbook. We have tried to provide complete details so others can see at least one model for implementing modeling exercises. However, we urge you to consult the references, especially to the laboratory portions of the exercises. We did not attempt to give details on safe ...
MEDICAL CHEMISTRY STUDY GUIDE
... important precautions are described. Everyone who works and performs experiments in a laboratory must follow these safety rules at all times. Students who do not obey the safety rules will not be allowed to enter and do any type of work in the laboratory and they will be counted as absent. It is the ...
... important precautions are described. Everyone who works and performs experiments in a laboratory must follow these safety rules at all times. Students who do not obey the safety rules will not be allowed to enter and do any type of work in the laboratory and they will be counted as absent. It is the ...
Calculations with Chemical Formulas and Equations
... • By definition, these are the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
... • By definition, these are the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
2013 - SQA
... 2 For this section of the examination you must use an HB pencil and, where necessary, an eraser. 3 Check that the answer sheet you have been given has your name, date of birth, SCN (Scottish Candidate Number) and Centre Name printed on it. Do not change any of these details. 4 If any of thi ...
... 2 For this section of the examination you must use an HB pencil and, where necessary, an eraser. 3 Check that the answer sheet you have been given has your name, date of birth, SCN (Scottish Candidate Number) and Centre Name printed on it. Do not change any of these details. 4 If any of thi ...
Chapter 5: Calculations and the Chemical Equation
... 1. The reactants which enter into a reaction. 2. The products which are formed by the reaction. 3. The amounts (moles) of each substance used and each substance produced. The Numbers in a Chemical Equation: 1. Subscripts: The small numbers to the lower right of chemical symbols. Subscripts represent ...
... 1. The reactants which enter into a reaction. 2. The products which are formed by the reaction. 3. The amounts (moles) of each substance used and each substance produced. The Numbers in a Chemical Equation: 1. Subscripts: The small numbers to the lower right of chemical symbols. Subscripts represent ...
Structure and function of the eukaryotic ADP
... extensively tested by 31P-NMR, where the enzyme proved to be highly specific for Dglucose. Residues important for catalysis have been modified by site-directed mutagenesis and the variants of H. sapiens ADPGK were purified and kinetic parameters determined. A single crystal was obtained from a trunc ...
... extensively tested by 31P-NMR, where the enzyme proved to be highly specific for Dglucose. Residues important for catalysis have been modified by site-directed mutagenesis and the variants of H. sapiens ADPGK were purified and kinetic parameters determined. A single crystal was obtained from a trunc ...
rhizopus oryzae - Journal of Marine Science and Technology
... and applied as substrate in chitinolytic activity assay. To 0.5 mL of 1% colloidal chitin suspension, 0.5 mL enzyme solution was mixed and incubated at 50°C for 30 min with violent shaking under pH 6.0. To stop reaction, 1 mL of 2,4dinitrosalicylic acid (DNS) reagent (containing 0.5 g/L DNS, 8 g/L N ...
... and applied as substrate in chitinolytic activity assay. To 0.5 mL of 1% colloidal chitin suspension, 0.5 mL enzyme solution was mixed and incubated at 50°C for 30 min with violent shaking under pH 6.0. To stop reaction, 1 mL of 2,4dinitrosalicylic acid (DNS) reagent (containing 0.5 g/L DNS, 8 g/L N ...
Physical Chemistry 3: — Chemical Kinetics - Christian
... • Solid state reactions are usually very slow. • Reaction rates in solids are determined by rate of diffusion (“hopping”) of the atoms and molecules via vacancies (unoccupied lattice positions, “Fehlstellen”) or interstitial sites (“Zwischengitterplätze”). • Concentration of vacancies and interstitia ...
... • Solid state reactions are usually very slow. • Reaction rates in solids are determined by rate of diffusion (“hopping”) of the atoms and molecules via vacancies (unoccupied lattice positions, “Fehlstellen”) or interstitial sites (“Zwischengitterplätze”). • Concentration of vacancies and interstitia ...
sch103manual - university of nairobi staff profiles
... Gases respond readily to pressure because there is so much space between the molecules that they can easily be confined to a smaller volume. Boyle’s law applies to whatever the gas, argon, carbon dioxide, water vapour, ...
... Gases respond readily to pressure because there is so much space between the molecules that they can easily be confined to a smaller volume. Boyle’s law applies to whatever the gas, argon, carbon dioxide, water vapour, ...
A non-hemorrhagic hybrid heparin/heparan sulfate with
... 40 min and the amount of blood was measured by Bradford assay. The results were expressed as the sum of the protein values of each tube minus the amount of protein present before the exposure to the test substance. 3. Results and discussion 3.1. Isolation and purification of shrimp H/HS The compounds ...
... 40 min and the amount of blood was measured by Bradford assay. The results were expressed as the sum of the protein values of each tube minus the amount of protein present before the exposure to the test substance. 3. Results and discussion 3.1. Isolation and purification of shrimp H/HS The compounds ...
Principles of BIOCHEMISTRY
... HMG-CoA reductase • HMG-CoA reductase is an integral membrane protein in the endoplasmic reticulum • Primary site for regulating cholesterol synthesis • Cholesterol-lowering statin drugs (e.g. Lovastatin) inhibit HMG-CoA reductase ...
... HMG-CoA reductase • HMG-CoA reductase is an integral membrane protein in the endoplasmic reticulum • Primary site for regulating cholesterol synthesis • Cholesterol-lowering statin drugs (e.g. Lovastatin) inhibit HMG-CoA reductase ...
Document
... Molar Mass • the mass of 1 mol of a substance (g/mol) – molar mass (in g/mol) of an element is the atomic mass (in amu) on the periodic table – formula weight (amu) of a compound same number as the molar mass (g/mol) of 1 mole of particles of that compound ...
... Molar Mass • the mass of 1 mol of a substance (g/mol) – molar mass (in g/mol) of an element is the atomic mass (in amu) on the periodic table – formula weight (amu) of a compound same number as the molar mass (g/mol) of 1 mole of particles of that compound ...
Size-exclusion chromatography
Size-exclusion chromatography (SEC) is a chromatographic method in which molecules in solution are separated by their size, and in some cases molecular weight. It is usually applied to large molecules or macromolecular complexes such as proteins and industrial polymers. Typically, when an aqueous solution is used to transport the sample through the column, the technique is known as gel-filtration chromatography, versus the name gel permeation chromatography, which is used when an organic solvent is used as a mobile phase. SEC is a widely used polymer characterization method because of its ability to provide good molar mass distribution (Mw) results for polymers.