SYLLABUS 5070 Cambridge O Level Chemistry
... (b) suggest suitable apparatus, given relevant information, for a variety of simple experiments, including collection of gases and measurement of rates of reaction 1.2 Methods of purification and analysis (a) describe methods of purification by the use of a suitable solvent, filtration and crystalli ...
... (b) suggest suitable apparatus, given relevant information, for a variety of simple experiments, including collection of gases and measurement of rates of reaction 1.2 Methods of purification and analysis (a) describe methods of purification by the use of a suitable solvent, filtration and crystalli ...
Chemistry 6–12
... Using the periodic table, analyze periodic trends in chemical properties (e.g., electron affinity, ionization energy, electronegativity) of the representative elements. ...
... Using the periodic table, analyze periodic trends in chemical properties (e.g., electron affinity, ionization energy, electronegativity) of the representative elements. ...
Gas phase chemistry of neutral metal clusters
... The 532 nm laser ablation of metal foil in the presence of O2 , H2 S, or small hydrocarbon compounds in He is the widely employed method to generate metal oxide, sulfide, or carbide clusters [34,37,38,40,73,74]. Four different ionization laser wavelengths (355 nm, 193 nm, 118 nm and 46.9 nm) are usua ...
... The 532 nm laser ablation of metal foil in the presence of O2 , H2 S, or small hydrocarbon compounds in He is the widely employed method to generate metal oxide, sulfide, or carbide clusters [34,37,38,40,73,74]. Four different ionization laser wavelengths (355 nm, 193 nm, 118 nm and 46.9 nm) are usua ...
Determination of the Molar Volume of H2(g) and of O2(g)
... In this experiment you will determine the molar volume of H2 and O2 under conditions that are very close to SATP. You will separately prepare H2 and O2 and collect each of these gases by downward displacement of water. This technique will be demonstrated by the teacher. A. Preparation of hydrogen ga ...
... In this experiment you will determine the molar volume of H2 and O2 under conditions that are very close to SATP. You will separately prepare H2 and O2 and collect each of these gases by downward displacement of water. This technique will be demonstrated by the teacher. A. Preparation of hydrogen ga ...
Stoichiometry - Bruder Chemistry
... Atomic Mass Atoms are so small, it is difficult to discuss how much they weigh in grams. Use atomic mass units. an atomic mass unit (amu) is one twelth the mass of a carbon-12 atom. This gives us a basis for comparison. The decimal numbers on the table are atomic masses in amu. ...
... Atomic Mass Atoms are so small, it is difficult to discuss how much they weigh in grams. Use atomic mass units. an atomic mass unit (amu) is one twelth the mass of a carbon-12 atom. This gives us a basis for comparison. The decimal numbers on the table are atomic masses in amu. ...
File
... Let the electrodes have a potential difference applied to them (about 10 kV). The electrode connected to the negative terminal is known as the cathode and the terminal connected to the positive terminal is known as the anode. As the discharge tube is evacuated, measure the pressure inside in terms o ...
... Let the electrodes have a potential difference applied to them (about 10 kV). The electrode connected to the negative terminal is known as the cathode and the terminal connected to the positive terminal is known as the anode. As the discharge tube is evacuated, measure the pressure inside in terms o ...
Chapter 36: Atomic Physics - Farmingdale State College
... particle left the source, it had a kinetic energy of 7.68 MeV. When it momentarily came to rest at the position r0, its velocity was zero and hence its kinetic energy was also zero there. Where did all the energy go? The whereabouts of this energy can be determined by referring back to figure 19.19, ...
... particle left the source, it had a kinetic energy of 7.68 MeV. When it momentarily came to rest at the position r0, its velocity was zero and hence its kinetic energy was also zero there. Where did all the energy go? The whereabouts of this energy can be determined by referring back to figure 19.19, ...
Reaction Energy
... • The energy absorbed or released as heat in a chemical or physical change is measured in a calorimeter. • In one kind of calorimeter, known quantities of reactants are sealed in a reaction chamber that is immersed in a known quantity of water. • Energy given off by the reaction is absorbed by the w ...
... • The energy absorbed or released as heat in a chemical or physical change is measured in a calorimeter. • In one kind of calorimeter, known quantities of reactants are sealed in a reaction chamber that is immersed in a known quantity of water. • Energy given off by the reaction is absorbed by the w ...
acid
... Weak acids and bases - Molecular compounds that are weak acids or weak bases are also weak electrolytes. Note that an acid forms H+ ion when added to water, and a base forms OH- ion. ...
... Weak acids and bases - Molecular compounds that are weak acids or weak bases are also weak electrolytes. Note that an acid forms H+ ion when added to water, and a base forms OH- ion. ...
Chemical bonding and structure
... (iii) argon is in Group 18 so does not form ions For some elements though, it is difficult to predict the ion that will form from its position in the Periodic Table. For example, as we learned in Chapter 3, the metals occurring in the middle of the Periodic Table, known as the transition elements, h ...
... (iii) argon is in Group 18 so does not form ions For some elements though, it is difficult to predict the ion that will form from its position in the Periodic Table. For example, as we learned in Chapter 3, the metals occurring in the middle of the Periodic Table, known as the transition elements, h ...
ch 3_1 atomhist
... • These particles can combine to make other kinds of tiny particles, too. • The six types of quarks are up, down, strange, charmed, top, and bottom. • Quarks have fractional electric charges of +2/3 or −1/3, unlike the +1 charge of a proton or the −1 charge of an electron. ...
... • These particles can combine to make other kinds of tiny particles, too. • The six types of quarks are up, down, strange, charmed, top, and bottom. • Quarks have fractional electric charges of +2/3 or −1/3, unlike the +1 charge of a proton or the −1 charge of an electron. ...
Materials - Hodder Education
... their chemical and physical properties before a physical and chemical explanation had been hypothesized. Knowledge of chemical bonding and chemical structures is used to prepare new useful materials or to modify the properties of currently used materials. Materials science is the scientific study of ...
... their chemical and physical properties before a physical and chemical explanation had been hypothesized. Knowledge of chemical bonding and chemical structures is used to prepare new useful materials or to modify the properties of currently used materials. Materials science is the scientific study of ...
Topic 4
... mixing/joining together/combining/merging of atomic orbitals to form molecular orbitals/new orbitals/orbitals of equal energy; Accept specific example such as mixing of s and p orbitals. sp; Do not award mark if sp2 or sp3 is also stated. one sigma and two pi (bonds); ...
... mixing/joining together/combining/merging of atomic orbitals to form molecular orbitals/new orbitals/orbitals of equal energy; Accept specific example such as mixing of s and p orbitals. sp; Do not award mark if sp2 or sp3 is also stated. one sigma and two pi (bonds); ...
Energy is the essence of chemistry It determines which reaction can
... expansion of a gas at higher pressure P1 into a container at lower pressure P2. The reverse process is non-spontaneous, i.e. surroundings must do work on the gas to increase its pressure from P2 to P1. A spontaneous process need not be fast. Thermodynamics does not consider time. For example Reactio ...
... expansion of a gas at higher pressure P1 into a container at lower pressure P2. The reverse process is non-spontaneous, i.e. surroundings must do work on the gas to increase its pressure from P2 to P1. A spontaneous process need not be fast. Thermodynamics does not consider time. For example Reactio ...
Chapter 4: Atomic Physics - Farmingdale State College
... particle left the source, it had a kinetic energy of 7.68 MeV. When it momentarily came to rest at the position r0, its velocity was zero and hence its kinetic energy was also zero there. Where did all the energy go? The whereabouts of this energy can be determined by referring back to the potential ...
... particle left the source, it had a kinetic energy of 7.68 MeV. When it momentarily came to rest at the position r0, its velocity was zero and hence its kinetic energy was also zero there. Where did all the energy go? The whereabouts of this energy can be determined by referring back to the potential ...
industry: applying chemical reactions
... for environmental harm. Ammonia-based contamination of the Snake River could, for example, cause another fish kill crisis. Along the same lines, manufacturing batteries comes with its own concerns regarding toxic metal waste. We should also consider what happens to batteries once their useful life i ...
... for environmental harm. Ammonia-based contamination of the Snake River could, for example, cause another fish kill crisis. Along the same lines, manufacturing batteries comes with its own concerns regarding toxic metal waste. We should also consider what happens to batteries once their useful life i ...
Learning at the symbolic level
... that even within this one class of representations there is considerable variety of form, such that students are expected to progress through increasingly complex types of equation that reflect subtle variations in format and meaning. The chapter then turns to a consideration of how the symbolic lev ...
... that even within this one class of representations there is considerable variety of form, such that students are expected to progress through increasingly complex types of equation that reflect subtle variations in format and meaning. The chapter then turns to a consideration of how the symbolic lev ...
key for Unit 1 pp 21
... (think about the definition of metalloids, or semi-metals as they are sometimes called). Metalloids are intermediate in behavior between metals and non-metals, and since metallic behavior varies across a period and up (or down) a group, we should not be surprised if there is not universal agreement ...
... (think about the definition of metalloids, or semi-metals as they are sometimes called). Metalloids are intermediate in behavior between metals and non-metals, and since metallic behavior varies across a period and up (or down) a group, we should not be surprised if there is not universal agreement ...
Final Study Guide (Semester 2) Answer Key
... a. Which chemical above is not soluble in water? Cu(OH)2 c. Which chemical above is the precipitate? Cu(OH)2 2. Solutions of Barium nitrate and potassium sulfate are mixed. ***The first thing you should do when solving this is look at the common ion chart and write down all the ions. It’s much easie ...
... a. Which chemical above is not soluble in water? Cu(OH)2 c. Which chemical above is the precipitate? Cu(OH)2 2. Solutions of Barium nitrate and potassium sulfate are mixed. ***The first thing you should do when solving this is look at the common ion chart and write down all the ions. It’s much easie ...
CHEM 1411 Exam #2 - HCC Learning Web
... ∆E = 2.18 x 10-18 x (4-1-25-1) J = 4.58 x 10-19 J = 4.58 x 10-19 J/(6.63 x 10-34Js) = 6.90 x 1014 s-1 = 3 x 108 m s-1/( 6.90 x 1014 s-1) = 4.34 x 10-7m = 434 nm 22. Pb(NO3)2(aq) + 2NaCl(aq) PbCl2(s) + 2NaNO3(aq) b. Pb+2(aq) + 2NO3-(aq) + 2Na+(aq) + 2Cl-(aq) PbCl2(s) +2NO3-(aq) + 2Na+(aq) c. ...
... ∆E = 2.18 x 10-18 x (4-1-25-1) J = 4.58 x 10-19 J = 4.58 x 10-19 J/(6.63 x 10-34Js) = 6.90 x 1014 s-1 = 3 x 108 m s-1/( 6.90 x 1014 s-1) = 4.34 x 10-7m = 434 nm 22. Pb(NO3)2(aq) + 2NaCl(aq) PbCl2(s) + 2NaNO3(aq) b. Pb+2(aq) + 2NO3-(aq) + 2Na+(aq) + 2Cl-(aq) PbCl2(s) +2NO3-(aq) + 2Na+(aq) c. ...
Porous silicon-based nanostructured microparticles as degradable
... Synthesis of 11-undecenylamine (Schematic 1 (2)): LiAlH4 (2.7 g, 71.1 mmol) was placed in a 250 mL round-bottom flask containing 50 mL of anhydrous THF, and the mixture was heated at reflux for 30 minutes under N2. Heating was stopped and a solution of 9-undecenamide (5.0 g, 27.3 mmol) in 100 mL of ...
... Synthesis of 11-undecenylamine (Schematic 1 (2)): LiAlH4 (2.7 g, 71.1 mmol) was placed in a 250 mL round-bottom flask containing 50 mL of anhydrous THF, and the mixture was heated at reflux for 30 minutes under N2. Heating was stopped and a solution of 9-undecenamide (5.0 g, 27.3 mmol) in 100 mL of ...
Slides
... by a closed valve to a second flask containing a vacuum. Once the valve is opened, the gas spontaneously becomes evenly distributed between the flasks. ...
... by a closed valve to a second flask containing a vacuum. Once the valve is opened, the gas spontaneously becomes evenly distributed between the flasks. ...