Fall 2013 Final practice questions w/o solution
... 8. Which statement best explains why the electron affinity of B is less positive than that of Li? A) B has electrons in p orbitals, so it is lower in energy. B) Li does not want to gain an electron because it already has a half-full s orbital. C) B is a smaller atom, so its valence electrons are mo ...
... 8. Which statement best explains why the electron affinity of B is less positive than that of Li? A) B has electrons in p orbitals, so it is lower in energy. B) Li does not want to gain an electron because it already has a half-full s orbital. C) B is a smaller atom, so its valence electrons are mo ...
Dialysis Guide_scienova
... Concentration of substance The dialysis speed depends on the concentration gradient, which is highest at the start of dialysis. Through the dialysis process the concentration gradient between the ...
... Concentration of substance The dialysis speed depends on the concentration gradient, which is highest at the start of dialysis. Through the dialysis process the concentration gradient between the ...
Decontamination of chemical and biological warfare „CBW… agents
... agents, an effective decontamination ~decon! defense is needed to reduce the lingering effects of such an attack. A new approach to this challenging problem relies upon the use of a novel, low temperature, atmospheric pressure plasma source to produce chemically reactive, fast-flow effluents that ar ...
... agents, an effective decontamination ~decon! defense is needed to reduce the lingering effects of such an attack. A new approach to this challenging problem relies upon the use of a novel, low temperature, atmospheric pressure plasma source to produce chemically reactive, fast-flow effluents that ar ...
CH 5 CHEM1A GASES - Santa Rosa Junior College
... The distinction of gases from liquids and solids 1. Gas volume changes greatly with pressure. 2. Gas volume changes greatly with temperature. 3. Gases have relatively low viscosity. 4. Most gases have relatively low densities under normal conditions. 5. Gases are miscible. ...
... The distinction of gases from liquids and solids 1. Gas volume changes greatly with pressure. 2. Gas volume changes greatly with temperature. 3. Gases have relatively low viscosity. 4. Most gases have relatively low densities under normal conditions. 5. Gases are miscible. ...
299 Unit 9, Worksheet 1— Dalton`s Law of Partial Pressures
... Concentrated hydrochloric acid is made by pumping hydrogen chloride gas into distilled water. The gas dissolves in the water creating H+ and Cl- ions. The most concentrated hydrochloric acid solution possible contains 439 grams HCl for each one liter of solution. Adding more HCl gas to this solution ...
... Concentrated hydrochloric acid is made by pumping hydrogen chloride gas into distilled water. The gas dissolves in the water creating H+ and Cl- ions. The most concentrated hydrochloric acid solution possible contains 439 grams HCl for each one liter of solution. Adding more HCl gas to this solution ...
New Type of Carbon/Carbon Composite as Anode Material for High
... created in the composites due to their milling. The crystallite dimension along c-axis (Lc ) was calculated on the basis of the Scherer equation: ...
... created in the composites due to their milling. The crystallite dimension along c-axis (Lc ) was calculated on the basis of the Scherer equation: ...
Synergic Role of Self-Interstitials and Vacancies in Indium Melting
... reduced as well as the shear elastic moduli leading to a structural instability of the solid and finally to its collapse at a critical temperature. However, successive measurements of Hunter and Siegal [4] showed that the values of shear elastic moduli decrease but are nonzero at the melting point, ...
... reduced as well as the shear elastic moduli leading to a structural instability of the solid and finally to its collapse at a critical temperature. However, successive measurements of Hunter and Siegal [4] showed that the values of shear elastic moduli decrease but are nonzero at the melting point, ...
THE INFLUENCE OF NITROGEN PRESSURE ON THE
... and microidentation methods. It was found, that the coatings formed by means of vacuum-arc method are two-phase objects. The change of nitrogen pressure from 2.0∙10-4 to 5.0∙10-4 Тоrr during the deposition increases the contents of its atoms in the condensate from 2.7 to 21.62 %, and this is accompa ...
... and microidentation methods. It was found, that the coatings formed by means of vacuum-arc method are two-phase objects. The change of nitrogen pressure from 2.0∙10-4 to 5.0∙10-4 Тоrr during the deposition increases the contents of its atoms in the condensate from 2.7 to 21.62 %, and this is accompa ...
Second Semester Review Part 1
... reduction of the pressure (at constant temperature) will cause it to melt. (D) None of these statements is correct. 100. A pure substance, above its melting point, is in a high pressure cylinder. Upon opening a valve on the cylinder a gas escapes. A pressure gauge on the cylinder shows a pressure of ...
... reduction of the pressure (at constant temperature) will cause it to melt. (D) None of these statements is correct. 100. A pure substance, above its melting point, is in a high pressure cylinder. Upon opening a valve on the cylinder a gas escapes. A pressure gauge on the cylinder shows a pressure of ...
____ 1. The energy required to convert a ground
... concentrations of X and Y were measured over a period of time. According to the results, which of the following can be concluded about the rate law for the reaction under the conditions studied? a. It is zero order in [X]. d. It is first order in [Y]. b. It is first order in [X]. e. The overall orde ...
... concentrations of X and Y were measured over a period of time. According to the results, which of the following can be concluded about the rate law for the reaction under the conditions studied? a. It is zero order in [X]. d. It is first order in [Y]. b. It is first order in [X]. e. The overall orde ...
1442 Final Review
... 13. A 0.20 M solution of MgSO4 has an observed osmotic pressure of 7.8 atm at 25° C. Determine the observed van’t Hoff factor for this experiment. a) 1.2 b) 1.4 *c) 1.6 d) 1.8 e) 2.0 ...
... 13. A 0.20 M solution of MgSO4 has an observed osmotic pressure of 7.8 atm at 25° C. Determine the observed van’t Hoff factor for this experiment. a) 1.2 b) 1.4 *c) 1.6 d) 1.8 e) 2.0 ...
Gases - chemmybear.com
... (a) When a gas-filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon. (b) When the balloon described in (a) is cooled further, the volume does not become zero; rather, the gas becomes a liquid or solid. (c) When NH3 gas is introduced at on ...
... (a) When a gas-filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon. (b) When the balloon described in (a) is cooled further, the volume does not become zero; rather, the gas becomes a liquid or solid. (c) When NH3 gas is introduced at on ...
Synthesis and characterization of MCM
... determinated by adsorption–desorption of nitrogen at liquid nitrogen temperature, using sorptometer Kelvin 1042. Scanning electron microscope (SEM) studies were performed on Seron Technology ,AIS 2100 detector. ...
... determinated by adsorption–desorption of nitrogen at liquid nitrogen temperature, using sorptometer Kelvin 1042. Scanning electron microscope (SEM) studies were performed on Seron Technology ,AIS 2100 detector. ...
Yuri Pleskov
... an attractive electrode material for use in theoretical and applied electrochemistry [1]. In particular, diamond electrodes have been reported to be stable and effective electrodes for environmentallyoriented [2] and analytical [3,4] purposes. As with many insulators, diamond can be transformed into ...
... an attractive electrode material for use in theoretical and applied electrochemistry [1]. In particular, diamond electrodes have been reported to be stable and effective electrodes for environmentallyoriented [2] and analytical [3,4] purposes. As with many insulators, diamond can be transformed into ...
Artigo-Valence Tautomeric Thin Films
... an appreciable sensitivity to the environment. As a consequence, intramolecular electron transfer (IET) can be induced not only by temperature variations but also by irradiation or pressure. For instance, Hendrickson et al. have reported results of the first picosecond time-resolved optical experime ...
... an appreciable sensitivity to the environment. As a consequence, intramolecular electron transfer (IET) can be induced not only by temperature variations but also by irradiation or pressure. For instance, Hendrickson et al. have reported results of the first picosecond time-resolved optical experime ...
microhardness studies
... reports have shown that an ultrasonic hardness tester consisting of the modification of the Brine11 indenter has been developed which enables instantaneous automatic readout using ultrasonics7. Hardness usually implies resistance to deformation, which in turn denotes the ability of one body to resis ...
... reports have shown that an ultrasonic hardness tester consisting of the modification of the Brine11 indenter has been developed which enables instantaneous automatic readout using ultrasonics7. Hardness usually implies resistance to deformation, which in turn denotes the ability of one body to resis ...
Fabric Cooling by Water Evaporation - ScholarWorks
... A comparison of the cooling dynamics exhibited by the cotton, polyester, nylon, and silk samples is illustrated in Fig. 4. It is seen that the cotton and polyester samples offered greater evaporative cooling overall than the silk and nylon samples. It is important to note, however, the nylon and sil ...
... A comparison of the cooling dynamics exhibited by the cotton, polyester, nylon, and silk samples is illustrated in Fig. 4. It is seen that the cotton and polyester samples offered greater evaporative cooling overall than the silk and nylon samples. It is important to note, however, the nylon and sil ...
Chapter 14: Gases
... Real Gases: - No gases are ideal. - Gas particles have volume (due to size and shape). - Subject to intermolecular forces * Most gases behave like “ideal” gases, except at high pressure and low temps ...
... Real Gases: - No gases are ideal. - Gas particles have volume (due to size and shape). - Subject to intermolecular forces * Most gases behave like “ideal” gases, except at high pressure and low temps ...
AP `94 Multiple Choice
... Part I: Multiple Choice Note: For all questions involving solutions and/or chemical equations, assume that the system is in pure water and at room temperature unless otherwise stated. Directions: Each set of lettered choices below refers to the numbered questions or statements immediately following ...
... Part I: Multiple Choice Note: For all questions involving solutions and/or chemical equations, assume that the system is in pure water and at room temperature unless otherwise stated. Directions: Each set of lettered choices below refers to the numbered questions or statements immediately following ...
Journal of Materials for optical and electronic devices www.rsc.org/MaterialsC
... excited states. The Yb3+ ion has gained particular attention for laser cooling because, unlike most other rare-earth ions, it has only one excited state, 2F5/2, that is located 1.2 eV above the ground state, 2F7/2 (see Fig. 1). Transitions between 2F7/2 and 2F5/2 occur at wavelengths of 1 mm where ...
... excited states. The Yb3+ ion has gained particular attention for laser cooling because, unlike most other rare-earth ions, it has only one excited state, 2F5/2, that is located 1.2 eV above the ground state, 2F7/2 (see Fig. 1). Transitions between 2F7/2 and 2F5/2 occur at wavelengths of 1 mm where ...
Thermal and chemical structure at the bottom of the lower mantle
... mantle early in Earth history, its survival depends on whether it was (and maybe still is) gravitationally and chemically stable (12). If this is the ...
... mantle early in Earth history, its survival depends on whether it was (and maybe still is) gravitationally and chemically stable (12). If this is the ...
Lattice parameter determination using a curved position
... towards lower 2 values. For each diffraction pattern, positions of the various hkl diffraction peaks were determined using a commercial software package (Igor Pro 5.05A; http://www.wavemetrics.com/). For all peaks except the 111 diffraction peaks, two symmetric Gaussian profiles were fitted to each ...
... towards lower 2 values. For each diffraction pattern, positions of the various hkl diffraction peaks were determined using a commercial software package (Igor Pro 5.05A; http://www.wavemetrics.com/). For all peaks except the 111 diffraction peaks, two symmetric Gaussian profiles were fitted to each ...
Separation and Purification Methods
... moving (thus the name), then the more time a compound spends in that phase, the farther it will travel. Chromatographic techniques fall into one of two categories: analytical and preparative. Analytical techniques are used to follow the course of reactions and determine purity of products. These met ...
... moving (thus the name), then the more time a compound spends in that phase, the farther it will travel. Chromatographic techniques fall into one of two categories: analytical and preparative. Analytical techniques are used to follow the course of reactions and determine purity of products. These met ...
Diamond anvil cell
A diamond anvil cell (DAC) is a device used in scientific experiments. It allows compressing a small (sub-millimeter-sized) piece of material to extreme pressures, which can exceed 600 gigapascals (6,000,000 bars / 6 million atmospheres).The device has been used to recreate the pressure existing deep inside planets, creating materials and phases not observed under normal conditions. Notable examples include the non-molecular ice X, polymeric nitrogen and metallic xenon (an inert gas at lower pressures).A DAC consists of two opposing diamonds with a sample compressed between the culets (tips). Pressure may be monitored using a reference material whose behavior under pressure is known. Common pressure standards include ruby fluorescence, and various structurally simple metals, such as copper or platinum. The uniaxial pressure supplied by the DAC may be transformed into uniform hydrostatic pressure using a pressure transmitting medium, such as argon, xenon, hydrogen, helium, paraffin oil or a mixture of methanol and ethanol. The pressure-transmitting medium is enclosed by a gasket and the two diamond anvils. The sample can be viewed through the diamonds and illuminated by X-rays and visible light. In this way, X-ray diffraction and fluorescence; optical absorption and photoluminescence; Mössbauer, Raman and Brillouin scattering; positron annihilation and other signals can be measured from materials under high pressure. Magnetic and microwave fields can be applied externally to the cell allowing nuclear magnetic resonance, electron paramagnetic resonance and other magnetic measurements. Attaching electrodes to the sample allows electrical and magnetoelectrical measurements as well as heating up the sample to a few thousand degrees. Much higher temperatures (up to 7000 K) can be achieved with laser-induced heating, and cooling down to millikelvins has been demonstrated.