
Lecture 25 Notes
... Concentration of solutions concentration -- the amount of solute dissolved in a given quantity of solvent or solution ...
... Concentration of solutions concentration -- the amount of solute dissolved in a given quantity of solvent or solution ...
lecture slides file
... Specific gravity is the ratio of densities of a substance to that of water. It is dimensionless. When immersed in water, substances with density greater than 1 kg/L (e.g. most metals) sink, and those having density less 1 (ice, most liquids, wood, etc) float. Density depends on the way atoms are pac ...
... Specific gravity is the ratio of densities of a substance to that of water. It is dimensionless. When immersed in water, substances with density greater than 1 kg/L (e.g. most metals) sink, and those having density less 1 (ice, most liquids, wood, etc) float. Density depends on the way atoms are pac ...
Personal Tutoring Help on Questions and Problems
... by the females of many insect species to attract the males for mating. One pheromone has the molecular formula C19H38O. Normally, the amount of this pheromone secreted by a female insect is about 1.0 ⫻ 10⫺12 g. How many molecules are there in this quantity? 3.30 The density of water is 1.00 g/mL at ...
... by the females of many insect species to attract the males for mating. One pheromone has the molecular formula C19H38O. Normally, the amount of this pheromone secreted by a female insect is about 1.0 ⫻ 10⫺12 g. How many molecules are there in this quantity? 3.30 The density of water is 1.00 g/mL at ...
Supplemental information
... S1 Characterization of the modified HFO nanoparticles Figure s1 demonstrates the physical stability and settleability of HFO nanoparticles prepared at a particle concentration of 100 mg·L-1 as Fe but with various concentration of CMC ranging from 0 to 0.161 wt %. Based on the results, this study foc ...
... S1 Characterization of the modified HFO nanoparticles Figure s1 demonstrates the physical stability and settleability of HFO nanoparticles prepared at a particle concentration of 100 mg·L-1 as Fe but with various concentration of CMC ranging from 0 to 0.161 wt %. Based on the results, this study foc ...
Burning a Candle in a Vessel, a Simple Experiment
... experiment was due to the thermal expansion of air. In a simple experiment, he placed an inclined inverted glass bell partially submerged in mercury, ignited the candle and quickly moved the candle inside the bell. The bell was quickly submerged and the column of mercury prevented air to bubble out, ...
... experiment was due to the thermal expansion of air. In a simple experiment, he placed an inclined inverted glass bell partially submerged in mercury, ignited the candle and quickly moved the candle inside the bell. The bell was quickly submerged and the column of mercury prevented air to bubble out, ...
mole - hrsbstaff.ednet.ns.ca
... 2H2(g) + O2 → 2H2O(g) This reaction requires two molecules of hydrogen and one molecule of oxygen. To carry out this chemical reaction a chemist must mix hydrogen and oxygen together in the correct ratio (2:1). How does the chemist know when the correct ratio is present? These molecules are too smal ...
... 2H2(g) + O2 → 2H2O(g) This reaction requires two molecules of hydrogen and one molecule of oxygen. To carry out this chemical reaction a chemist must mix hydrogen and oxygen together in the correct ratio (2:1). How does the chemist know when the correct ratio is present? These molecules are too smal ...
TOPIC 7. CHEMICAL CALCULATIONS I
... CHEMICAL CALCULATIONS I - atomic and formula weights. Atomic structure revisited. In Topic 2, atoms were described as ranging from the simplest atom, H, containing a single proton and usually no neutrons in its nucleus with one electron orbiting outside that nucleus, through to very large atoms such ...
... CHEMICAL CALCULATIONS I - atomic and formula weights. Atomic structure revisited. In Topic 2, atoms were described as ranging from the simplest atom, H, containing a single proton and usually no neutrons in its nucleus with one electron orbiting outside that nucleus, through to very large atoms such ...
Human Physiology: An Integrated Approach Molecular Interactions 1
... given time, so an up regulation of enzymes would be expected to A) increase the level of productivity of chemical reactions that rely on them. B) decrease the level of productivity of chemical reactions that rely on them. C) increase the rate of reactions catalyzed by the enzymes. D) decrease the ra ...
... given time, so an up regulation of enzymes would be expected to A) increase the level of productivity of chemical reactions that rely on them. B) decrease the level of productivity of chemical reactions that rely on them. C) increase the rate of reactions catalyzed by the enzymes. D) decrease the ra ...
TOPIC 7. CHEMICAL CALCULATIONS I
... CHEMICAL CALCULATIONS I - atomic and formula weights. Atomic structure revisited. In Topic 2, atoms were described as ranging from the simplest atom, H, containing a single proton and usually no neutrons in its nucleus with one electron orbiting outside that nucleus, through to very large atoms such ...
... CHEMICAL CALCULATIONS I - atomic and formula weights. Atomic structure revisited. In Topic 2, atoms were described as ranging from the simplest atom, H, containing a single proton and usually no neutrons in its nucleus with one electron orbiting outside that nucleus, through to very large atoms such ...
EXAM IIR - Academics
... 20. In another, parallel universe, the charge/mass ratio of a fundamental particle was measured and found to be + 5.685 x 10-12 coulombs/kg. From this one can conclude that: (A) The mass of the particle must be very large and/or the charge must be very small. (B) The particle has a net negative char ...
... 20. In another, parallel universe, the charge/mass ratio of a fundamental particle was measured and found to be + 5.685 x 10-12 coulombs/kg. From this one can conclude that: (A) The mass of the particle must be very large and/or the charge must be very small. (B) The particle has a net negative char ...
35 IChO Problems 1-13
... reached steady state. As a result 14C accompanies the stable isotopes 12C and 13C in the atmosphere and participates indistinguishably in all carbon chemical reactions. It forms CO2 with oxygen and enters all living systems through photosynthesis under constant C14/C12 isotopic ratio, labeling the o ...
... reached steady state. As a result 14C accompanies the stable isotopes 12C and 13C in the atmosphere and participates indistinguishably in all carbon chemical reactions. It forms CO2 with oxygen and enters all living systems through photosynthesis under constant C14/C12 isotopic ratio, labeling the o ...
Unit 2 Powerpoint Notes
... product that can be produced from a given amount of reactant (found with stoichiometry). • The actual yield of a product is the measured amount of that product obtained from a reaction (given in problem). • The percentage yield is the ratio of the actual yield to the theoretical yield, multiplied by ...
... product that can be produced from a given amount of reactant (found with stoichiometry). • The actual yield of a product is the measured amount of that product obtained from a reaction (given in problem). • The percentage yield is the ratio of the actual yield to the theoretical yield, multiplied by ...
Stoichiometry: Calculations with Chemical Formulas and
... Molar Mass • 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 ...
... Molar Mass • 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 ...
Stoichiometry and the Mole
... The mole is Avogadro’s Number of items (6.02 x 1023). A mole of atoms weighs the same number of grams as the atomic weight. 1 mole of hydrogen weighs 1.0079g. 1 mole of carbon atoms weighs 12.011g. The atomic weight is not only the number of protons and neutrons but is the grams of 1 mole of atoms. ...
... The mole is Avogadro’s Number of items (6.02 x 1023). A mole of atoms weighs the same number of grams as the atomic weight. 1 mole of hydrogen weighs 1.0079g. 1 mole of carbon atoms weighs 12.011g. The atomic weight is not only the number of protons and neutrons but is the grams of 1 mole of atoms. ...
Structural Studies on Sulfated Glycopeptides from the Carbohydrate
... Sephadex G-50 (fine) using water as eluent. The fractions which were positive to carbazole were pooled and further digested with Pronase as described below. The trichloroacetic acid treatment and the subsequent gel filtration here and elsewhere were carried out below 4 “C. Pronase Digestion-Pronase ...
... Sephadex G-50 (fine) using water as eluent. The fractions which were positive to carbazole were pooled and further digested with Pronase as described below. The trichloroacetic acid treatment and the subsequent gel filtration here and elsewhere were carried out below 4 “C. Pronase Digestion-Pronase ...
Practice Exercise 1
... asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert 12 g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 to numbers of C atoms. To make these conversions, we use the definition of mole and Avogadro’s number. Solv ...
... asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert 12 g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 to numbers of C atoms. To make these conversions, we use the definition of mole and Avogadro’s number. Solv ...
Isolation of Rat Transferrin Using CNBr-Activated
... Sera for the isolation of transferrin or antitransferrin were diluted (1:2) with a buffer which had twice the concentration of the starting buffer before they were applied to the column. Buffers used for elution of the Sepharose column were: a. for transferrin: starting buffer: phosphate-citrate pH ...
... Sera for the isolation of transferrin or antitransferrin were diluted (1:2) with a buffer which had twice the concentration of the starting buffer before they were applied to the column. Buffers used for elution of the Sepharose column were: a. for transferrin: starting buffer: phosphate-citrate pH ...
03_Worked_Examples
... asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert 12 g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 to numbers of C atoms. To make these conversions, we use the definition of mole and Avogadro’s number. Solv ...
... asked to arrange the samples in order of increasing numbers of C atoms. Plan To determine the number of C atoms in each sample, we must convert 12 g 12C, 1 mol C2H2, and 9 × 1023 molecules CO2 to numbers of C atoms. To make these conversions, we use the definition of mole and Avogadro’s number. Solv ...
Chem expo 12
... environment. The techniques that we will investigate include gravimetric and volumetric analyses which can be performed in the school laboratory as well as more complex modern instrumental techniques involving spectroscopy and chromatography. Organic chemical pathways, where we will investigate synt ...
... environment. The techniques that we will investigate include gravimetric and volumetric analyses which can be performed in the school laboratory as well as more complex modern instrumental techniques involving spectroscopy and chromatography. Organic chemical pathways, where we will investigate synt ...
9/10/10 1 Chemistry 121: Atomic and Molecular Chemistry
... Chemistry 121: Atomic and Molecular Chemistry Topic 2: Stoichiometry and Related Atomic Number, Mass Number, and Isotopes • Atoms can be identified by the number of protons and neutrons they contain. • The atomic number (Z) is the number of protons in the nucleus of each atom of an element. • In ...
... Chemistry 121: Atomic and Molecular Chemistry Topic 2: Stoichiometry and Related Atomic Number, Mass Number, and Isotopes • Atoms can be identified by the number of protons and neutrons they contain. • The atomic number (Z) is the number of protons in the nucleus of each atom of an element. • In ...
Final Exam - KFUPM Faculty List
... this has a [Ne]3s2 configuration, thus a I1 which is smallest, an I2 being larger (because the second s electron is more strongly bound, having no repulsions anymore in 3s), and I3 being largest (jump by a factor of 6 to 7) when an electron is removed from the core. So it can be Mg B) Na this has a ...
... this has a [Ne]3s2 configuration, thus a I1 which is smallest, an I2 being larger (because the second s electron is more strongly bound, having no repulsions anymore in 3s), and I3 being largest (jump by a factor of 6 to 7) when an electron is removed from the core. So it can be Mg B) Na this has a ...
Characterization of Low Molecular Weight Glutenin Subunits by
... these DNA-derived sequences are slightly different from the Nterminal sequence of the "aggregated gliadin" subunit (LMWGS) described by Shewry et al (1983) and the N-terminal sequence of a major LMW-GS reported by Kasarda et al (1988). Tao and Kasarda (1989) found this latter sequence to be the majo ...
... these DNA-derived sequences are slightly different from the Nterminal sequence of the "aggregated gliadin" subunit (LMWGS) described by Shewry et al (1983) and the N-terminal sequence of a major LMW-GS reported by Kasarda et al (1988). Tao and Kasarda (1989) found this latter sequence to be the majo ...
Unit- 5.pmd
... mines to adsorb poisonous gases. (iii) Control of humidity: Silica and aluminium gels are used as adsorbents for removing moisture and controlling humidity. (iv) Removal of colouring matter from solutions: Animal charcoal removes colours of solutions by adsorbing coloured impurities. (v) Heterogeneo ...
... mines to adsorb poisonous gases. (iii) Control of humidity: Silica and aluminium gels are used as adsorbents for removing moisture and controlling humidity. (iv) Removal of colouring matter from solutions: Animal charcoal removes colours of solutions by adsorbing coloured impurities. (v) Heterogeneo ...
Mole Concept - Shailendra Kumar Chemistry
... Sodium borohydride, NaBH4, a substance used in the synthesis of many pharma c e u t i c a l agents, can be prepared by reaction of NaH with B 2H 6 according to the equation 2 NaBH4. How many grams of NaBH4 can be prepared by reaction 2 NaH + B2H6 between 8.55 g of NaH and 6.75 g of B2H6 ? Which reac ...
... Sodium borohydride, NaBH4, a substance used in the synthesis of many pharma c e u t i c a l agents, can be prepared by reaction of NaH with B 2H 6 according to the equation 2 NaBH4. How many grams of NaBH4 can be prepared by reaction 2 NaH + B2H6 between 8.55 g of NaH and 6.75 g of B2H6 ? Which reac ...
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.