Introduction
... 1) An atom (or molecule) in its elemental state has an oxidation number of 0. 2) An atom in a monatomic ion (Na+, Cl-) has an oxidation number identical to its charge. 3a) Hydrogen has an oxidation number of +1, unless it is combined with a metal, in which case it has an oxidation number of –1. 3b) ...
... 1) An atom (or molecule) in its elemental state has an oxidation number of 0. 2) An atom in a monatomic ion (Na+, Cl-) has an oxidation number identical to its charge. 3a) Hydrogen has an oxidation number of +1, unless it is combined with a metal, in which case it has an oxidation number of –1. 3b) ...
CHEMISTRY 123-07 Midterm #1 – Answer key October 14, 2010
... PART II: SHORT ANSWER (Each short answer question has a 1-point value!!) 31. Molarity is defined as the number of moles of solute per volume of solution in liters. 32. Ions that contain atoms of more than one element are called polyatomic ions. 33. Proton donors are known as Brønsted acids. 34. A co ...
... PART II: SHORT ANSWER (Each short answer question has a 1-point value!!) 31. Molarity is defined as the number of moles of solute per volume of solution in liters. 32. Ions that contain atoms of more than one element are called polyatomic ions. 33. Proton donors are known as Brønsted acids. 34. A co ...
Answers to examination questions
... Q4 The ions formed across period 3 would be Na+, Mg2+, Al3+ and P3−, S2− and Cl−. There is a decrease in ionic radii from Na+ to Al3+: all the ions have the electron arrangement of 2,8 (that is they, are isoelectronic), however, there is a progressive increase in the nuclear charge due to the additi ...
... Q4 The ions formed across period 3 would be Na+, Mg2+, Al3+ and P3−, S2− and Cl−. There is a decrease in ionic radii from Na+ to Al3+: all the ions have the electron arrangement of 2,8 (that is they, are isoelectronic), however, there is a progressive increase in the nuclear charge due to the additi ...
Chapter 12 Oxidation-Reduction Reactions
... spontaneously. 3. Make a simple redox table similar to Table 12.1 that contains all the metal atoms and metal ions that you analyzed in this investigation. Note that the ion that was able to oxidize all other metal atoms is placed at the top of the left column. In the next row, place the ion that ox ...
... spontaneously. 3. Make a simple redox table similar to Table 12.1 that contains all the metal atoms and metal ions that you analyzed in this investigation. Note that the ion that was able to oxidize all other metal atoms is placed at the top of the left column. In the next row, place the ion that ox ...
Document
... Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate of reaction. Catalysts change the rate of chemical reactions but are not used up during the reaction. Different reactions need different catalysts. Catalysts are important in increasing the ...
... Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate of reaction. Catalysts change the rate of chemical reactions but are not used up during the reaction. Different reactions need different catalysts. Catalysts are important in increasing the ...
2012 Chem 13 News Exam
... (ii) adding 0.004 moles of sodium formate, NaHCOO (iii) adding 0.004 moles of HCl A ...
... (ii) adding 0.004 moles of sodium formate, NaHCOO (iii) adding 0.004 moles of HCl A ...
Appendix - Cengage
... The electrons between two atoms in a covalent bond are not always shared equally. When the atoms sharing an electron pair are identical, such as two oxygen atoms, the electrons are attracted equally by both atoms and so are shared equally. The result is a nonpolar molecule. The term nonpolar implies ...
... The electrons between two atoms in a covalent bond are not always shared equally. When the atoms sharing an electron pair are identical, such as two oxygen atoms, the electrons are attracted equally by both atoms and so are shared equally. The result is a nonpolar molecule. The term nonpolar implies ...
GCE Chemistry Question Paper Unit 05 - Energetics, Redox
... Calculate the temperature below which this reaction is spontaneous. ...
... Calculate the temperature below which this reaction is spontaneous. ...
Atoms and Molecules - E
... number 10 because electronic configuration of atomic number 11 will be 2, 8, 1 so, it has to loose only 1e- from its outermost shall to be stable which is more easy than the element with atomic number 10 because its electronic configuration is 2, 8 and has 8e- in the outermost shell and hence is alr ...
... number 10 because electronic configuration of atomic number 11 will be 2, 8, 1 so, it has to loose only 1e- from its outermost shall to be stable which is more easy than the element with atomic number 10 because its electronic configuration is 2, 8 and has 8e- in the outermost shell and hence is alr ...
Structure and Properties of Matter
... molecule and a liquid. Sodium chloride (common salt) contains equal number of sodium and chlorine atoms and is represented by the formula, NaCl. Sulphuric acid, H2SO4 contains three elements : hydrogen, oxygen and sulphur. 2.5.1 Valency and formulation Every element has a definite capacity to combin ...
... molecule and a liquid. Sodium chloride (common salt) contains equal number of sodium and chlorine atoms and is represented by the formula, NaCl. Sulphuric acid, H2SO4 contains three elements : hydrogen, oxygen and sulphur. 2.5.1 Valency and formulation Every element has a definite capacity to combin ...
pdfCfE Higher - Unit 3 - Pupil Booklet 2 MB
... In a continuous process the reactants are continuously loaded at one end of the reaction vessel and the products are removed at the other end. Each process has advantages and disadvantages. ...
... In a continuous process the reactants are continuously loaded at one end of the reaction vessel and the products are removed at the other end. Each process has advantages and disadvantages. ...
Midterm Practice Exam Key
... 1. A substance is considered ____________ if it will dissolve in a specific solvent. 2. An ____________ in the oxidation number of an atom signifies oxidation, while a ____________ in the oxidation number signifies reduction. 3. A ____________ reaction is one in which the aqueous (dissolved) ions ...
... 1. A substance is considered ____________ if it will dissolve in a specific solvent. 2. An ____________ in the oxidation number of an atom signifies oxidation, while a ____________ in the oxidation number signifies reduction. 3. A ____________ reaction is one in which the aqueous (dissolved) ions ...
Chemistry 20
... Illustrate how Boyle’s and Charles’s laws, individually and combined, are related to the ideal gas law (PV = nRT ) a) express pressure in a variety of ways, including units of kilopascals, atmospheres and millimetres of mercury b) perform calculations, based on the gas laws, under STP, SATP and othe ...
... Illustrate how Boyle’s and Charles’s laws, individually and combined, are related to the ideal gas law (PV = nRT ) a) express pressure in a variety of ways, including units of kilopascals, atmospheres and millimetres of mercury b) perform calculations, based on the gas laws, under STP, SATP and othe ...
Spring 2014
... The initial pressure, number of moles, and temperature of the gas are noted on the diagram. Which diagram (2)-(4) most closely represents the result of doubling the pressure while keeping the temperature and number of moles of gas constant? A) diagram (2) ...
... The initial pressure, number of moles, and temperature of the gas are noted on the diagram. Which diagram (2)-(4) most closely represents the result of doubling the pressure while keeping the temperature and number of moles of gas constant? A) diagram (2) ...
Chem 2A Final Review
... Empirical and Molecular Formula Balancing Chemical Formulas Limiting Reagents Theoretical and Percent Yield 64. The answer that is closest to the number of grams of oxygen in 6.022 1023 molecules of O2 is: ...
... Empirical and Molecular Formula Balancing Chemical Formulas Limiting Reagents Theoretical and Percent Yield 64. The answer that is closest to the number of grams of oxygen in 6.022 1023 molecules of O2 is: ...
Enzymes
... If there is a problem, We look for a solution. If there is a better way, We find it. If we need help, We ask. If a teammate needs help, We give. ...
... If there is a problem, We look for a solution. If there is a better way, We find it. If we need help, We ask. If a teammate needs help, We give. ...
avogadro exam 2012 - University of Waterloo
... *C the copper will absorb the greatest quantity of heat ...
... *C the copper will absorb the greatest quantity of heat ...
NC PowerPoints - Taylor High School
... De-caffeinated products produced with ethyl ethanoate are often described on the packaging as "naturally decaffeinated" because ethyl ethanoate is a chemical found naturally in many fruits. Caffeine (C8H10N4O2) is an example of a class of compounds called alkaloids which are produced by plants. The ...
... De-caffeinated products produced with ethyl ethanoate are often described on the packaging as "naturally decaffeinated" because ethyl ethanoate is a chemical found naturally in many fruits. Caffeine (C8H10N4O2) is an example of a class of compounds called alkaloids which are produced by plants. The ...
CLASS X carbon and its compound
... called branched chain hydrocarbons. 13. Isomerism : The phenomenon due to which there can exist two or more organic compounds, with different physical and chemical properties, due to the difference in arrangement of carbon atoms in their structure, but have same chemical formula is called isomerism. ...
... called branched chain hydrocarbons. 13. Isomerism : The phenomenon due to which there can exist two or more organic compounds, with different physical and chemical properties, due to the difference in arrangement of carbon atoms in their structure, but have same chemical formula is called isomerism. ...
Regents Chemistry Topic Review Packet
... You can recognize an excited state electron configuration. If the configuration does not match that on the Periodic Table for that number of electrons, then it is an excited state. 9. When an electron returns from a higher energy state to a lower energy state, it emits a specific amount of energy ...
... You can recognize an excited state electron configuration. If the configuration does not match that on the Periodic Table for that number of electrons, then it is an excited state. 9. When an electron returns from a higher energy state to a lower energy state, it emits a specific amount of energy ...
aq - Wikispaces
... The table on the left gives the eight most commonly used prefixes in the metric system. It also includes five rows that do not have prefixes. The middle row is for the unit: metre, litre, gram, newton, or any other legal metric unit. ...
... The table on the left gives the eight most commonly used prefixes in the metric system. It also includes five rows that do not have prefixes. The middle row is for the unit: metre, litre, gram, newton, or any other legal metric unit. ...
Addition of ketene to ethylene oxide
... one, ketene has also been allowed to react with a wide variety of reagents. ...
... one, ketene has also been allowed to react with a wide variety of reagents. ...
AS CHECKLISTS File
... covalently-bonded atoms have different electronegativities, resulting in a polar bond. Describe intermolecular forces based on permanent dipoles, as in hydrogen chloride, and instantaneous dipoles (van der Waals’ forces), as in the noble gases. Describe hydrogen bonding, including the role of a lone ...
... covalently-bonded atoms have different electronegativities, resulting in a polar bond. Describe intermolecular forces based on permanent dipoles, as in hydrogen chloride, and instantaneous dipoles (van der Waals’ forces), as in the noble gases. Describe hydrogen bonding, including the role of a lone ...
May/Jun 16 Paper 3 - Theory (Core) QP S2
... (a) The table describes the ease of reduction of some metal oxides with carbon. metal oxide ...
... (a) The table describes the ease of reduction of some metal oxides with carbon. metal oxide ...
Artificial photosynthesis
Artificial photosynthesis is a chemical process that replicates the natural process of photosynthesis, a process that converts sunlight, water, and carbon dioxide into carbohydrates and oxygen. The term is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of a fuel (a solar fuel). Photocatalytic water splitting converts water into Hydrogen Ions and oxygen, and is a main research area in artificial photosynthesis. Light-driven carbon dioxide reduction is another studied process, replicating natural carbon fixation.Research developed in this field encompasses design and assembly of devices (and their components) for the direct production of solar fuels, photoelectrochemistry and its application in fuel cells, and engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight. Many, if not most, of the artificial approaches are bio-inspired, i.e., they rely on biomimetics.