Chem I Review Part 1
... E. none of these 37. The total number of electrons present in a sulfate ion is A. 2. B. 26. C. 32. D. 48. E. 50. 38. Which of these elements is chemically similar to magnesium? A. sulfur B. calcium C. iron D. nickel E. potassium 39. An atom of bromine has a mass about four times greater than that of ...
... E. none of these 37. The total number of electrons present in a sulfate ion is A. 2. B. 26. C. 32. D. 48. E. 50. 38. Which of these elements is chemically similar to magnesium? A. sulfur B. calcium C. iron D. nickel E. potassium 39. An atom of bromine has a mass about four times greater than that of ...
Physical Chemistry Problems. ©Mike Lyons 2009
... a. What is the internal energy U and the enthalpy H of a system? Write down an expression for the First Law of Thermodynamics which relates the change in internal energy of a system to the work done on the system and the heat absorbed by the system. Hence derive a relationship between the change in ...
... a. What is the internal energy U and the enthalpy H of a system? Write down an expression for the First Law of Thermodynamics which relates the change in internal energy of a system to the work done on the system and the heat absorbed by the system. Hence derive a relationship between the change in ...
19a - The BOD
... “Dissolved oxygen” is there. It is a measure of how much oxygen is dissolved in a water sample. It is a measure of oxygen content. BOD is the amount of oxygen that would be consumed to completely decompose the organic matter in a water sample. It is not an indication of oxygen content. It is an indi ...
... “Dissolved oxygen” is there. It is a measure of how much oxygen is dissolved in a water sample. It is a measure of oxygen content. BOD is the amount of oxygen that would be consumed to completely decompose the organic matter in a water sample. It is not an indication of oxygen content. It is an indi ...
Chemistry Syllabus - Madison County Schools
... 3a. Calculate the number of protons, neutrons, and electrons in individual isotopes using atomic numbers and mass numbers, and write electron configurations of elements and ions following the Aufbau principle. (DOK 1) 3b. Analyze patterns and trends in the organization of elements in the periodic ta ...
... 3a. Calculate the number of protons, neutrons, and electrons in individual isotopes using atomic numbers and mass numbers, and write electron configurations of elements and ions following the Aufbau principle. (DOK 1) 3b. Analyze patterns and trends in the organization of elements in the periodic ta ...
Chemistry Syllabus
... Periodic properties (e.g., metal/nonmetal/metalloid behavior, electrical/heat conductivity, electronegativity, electron affinity, ionization energy, atomic/covalent/ionic radius) 2e. Compare the properties of compounds according to their type of bonding. (DOK 1) Covalent, ionic, and metallic bon ...
... Periodic properties (e.g., metal/nonmetal/metalloid behavior, electrical/heat conductivity, electronegativity, electron affinity, ionization energy, atomic/covalent/ionic radius) 2e. Compare the properties of compounds according to their type of bonding. (DOK 1) Covalent, ionic, and metallic bon ...
Chapter 7 Ionic and Metallic Bonding
... ions and molecules The Octet Rule: in forming compounds, atoms tend to achieve a noble gas configuration; 8 in the outer level is stable Each noble gas (except He, which has 2) has 8 electrons in the outer level ...
... ions and molecules The Octet Rule: in forming compounds, atoms tend to achieve a noble gas configuration; 8 in the outer level is stable Each noble gas (except He, which has 2) has 8 electrons in the outer level ...
29 Electric Potential
... • However, the zero of potential energy has no physical significance. Only the change in potential energy matters. • Like charges will always have a greater potential energy when they are a finite value of r apart than when they are separated by infinity. • Unlike charges will always have less poten ...
... • However, the zero of potential energy has no physical significance. Only the change in potential energy matters. • Like charges will always have a greater potential energy when they are a finite value of r apart than when they are separated by infinity. • Unlike charges will always have less poten ...
Corrections to Noggle, Physical Chemistry, 3rd Edition, 1st Printing
... into the surroundings is absorbed in a reversible process. (If that were not the case, they could not calculate Ssurroundings by dividing qsurroundings by T, the temperature of the surroundings.) This problem represents is a bipartite system composed of what they call “the system” and what they cal ...
... into the surroundings is absorbed in a reversible process. (If that were not the case, they could not calculate Ssurroundings by dividing qsurroundings by T, the temperature of the surroundings.) This problem represents is a bipartite system composed of what they call “the system” and what they cal ...
study material class X (science)
... CaCO3+2HCl CaCl2 + H2O +CO2 (b) Zinc granules react with dilute hydrochloric acid to give hydrogen gas. it is a displacement reaction Zn(s)+2HCl ZnCl2(aq)+H2(g) 3. The gases hydrogen & chlorine do not react with each other even if kept together for a long time . However, in the presence of sunli ...
... CaCO3+2HCl CaCl2 + H2O +CO2 (b) Zinc granules react with dilute hydrochloric acid to give hydrogen gas. it is a displacement reaction Zn(s)+2HCl ZnCl2(aq)+H2(g) 3. The gases hydrogen & chlorine do not react with each other even if kept together for a long time . However, in the presence of sunli ...
3 molecules
... MW of 164.2 g/mol and is 73.14 %C and 7.37 %H; the remainder is oxygen. What are the empirical and molecular ...
... MW of 164.2 g/mol and is 73.14 %C and 7.37 %H; the remainder is oxygen. What are the empirical and molecular ...
Chemistry 20H
... A physical change is one where the substance retains its identity. In a physical reaction an element remains the same element and a compound remains the same compound. Examples of physical reactions include melting, freezing, boiling, condensing and subliming. When a substance like water (H2O) freez ...
... A physical change is one where the substance retains its identity. In a physical reaction an element remains the same element and a compound remains the same compound. Examples of physical reactions include melting, freezing, boiling, condensing and subliming. When a substance like water (H2O) freez ...
Permanent magnets Electromagnets
... What would happen if bulb A burns out? What would happen if bulbs B or C burn out? What if bulbs B and C burn out? ...
... What would happen if bulb A burns out? What would happen if bulbs B or C burn out? What if bulbs B and C burn out? ...
Slide 1
... One important property of the noble gases is their inactivity. They are inactive because their outermost energy level is full. Because they do not readily combine with other elements to form compounds, the noble gases are called inert. The family of noble gases includes helium, neon, argon, krypton, ...
... One important property of the noble gases is their inactivity. They are inactive because their outermost energy level is full. Because they do not readily combine with other elements to form compounds, the noble gases are called inert. The family of noble gases includes helium, neon, argon, krypton, ...
to view
... electrons occupy anionic vacancies. These sites are called F centers. These electrons absorb energy from the visible region and transmits yellow colour. (ii) In the crystal of FeO, some of the Fe2+ cations are replaced by Fe3+ ions. Three Fe2+ ions are replaced by two Fe3+ ions to make up for the lo ...
... electrons occupy anionic vacancies. These sites are called F centers. These electrons absorb energy from the visible region and transmits yellow colour. (ii) In the crystal of FeO, some of the Fe2+ cations are replaced by Fe3+ ions. Three Fe2+ ions are replaced by two Fe3+ ions to make up for the lo ...
Notebook - Science
... isotope: each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei proton: stable subatomic particle occurring in all atomic nuclei, with positive electric charge to that of an electron, but of opposite sign neutron: subatom ...
... isotope: each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei proton: stable subatomic particle occurring in all atomic nuclei, with positive electric charge to that of an electron, but of opposite sign neutron: subatom ...
1412e3 - studylib.net
... _____ 19. The half-life for the beta-decay of cesium-137 is 30 years. How many years must pass to reduce a 500 mg sample of cesium-137 to one-millionth of its initial amount? a) 54 yr b) 153 yr c) 227 yr d) 598 yr _____ 20. I -131 has a half-life of 8.04 days. Assuming you start with a 5.00 mg samp ...
... _____ 19. The half-life for the beta-decay of cesium-137 is 30 years. How many years must pass to reduce a 500 mg sample of cesium-137 to one-millionth of its initial amount? a) 54 yr b) 153 yr c) 227 yr d) 598 yr _____ 20. I -131 has a half-life of 8.04 days. Assuming you start with a 5.00 mg samp ...
Final Review 2006
... ____ 76. What principle states that atoms tend to form compounds so that each atom can have eight electrons in its outermost energy level? a. rule of eights c. configuration rule b. Avogadro principle d. octet rule ____ 77. Multiple covalent bonds may occur in atoms that contain carbon, nitrogen, or ...
... ____ 76. What principle states that atoms tend to form compounds so that each atom can have eight electrons in its outermost energy level? a. rule of eights c. configuration rule b. Avogadro principle d. octet rule ____ 77. Multiple covalent bonds may occur in atoms that contain carbon, nitrogen, or ...
Teaching of Electric Circuits Theories in Introductory Courses: How
... That same year, Ampère had shown that the magnetic effect is proportional to the current that creates it, and used a moving magnetic needle to build an instrument to measure the electric current – the galvanometer. The early galvanometer was a compass placed inside of a coil of wire. These instrumen ...
... That same year, Ampère had shown that the magnetic effect is proportional to the current that creates it, and used a moving magnetic needle to build an instrument to measure the electric current – the galvanometer. The early galvanometer was a compass placed inside of a coil of wire. These instrumen ...
Lecture 7 Electric Potential – Chapter 25
... • Electric field near an infinite nonconducting sheet of uniform charge does NOT depend on distance from sheet • How can that be? ...
... • Electric field near an infinite nonconducting sheet of uniform charge does NOT depend on distance from sheet • How can that be? ...
2C - Edexcel
... volume of alkali. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......................................... cm3 maximum temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................... °C ...
... volume of alkali. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ......................................... cm3 maximum temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................... °C ...
Chapter 7 Ionic and Metallic Bonding
... chemical properties of atoms, and are those in the outer energy level. Valence electrons - The s and p electrons in the outer energy level –the highest occupied energy level Core electrons -those in the energy ...
... chemical properties of atoms, and are those in the outer energy level. Valence electrons - The s and p electrons in the outer energy level –the highest occupied energy level Core electrons -those in the energy ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.