Slide 1 - MrCard.Org
... positive ion from one ionic compound exchanges with positive ion of another ionic compound, always have 2 compounds for reactants, usually occurs in aqueous solution and results in either formation of a precipitate, production of a gas, or formation of a molecular compound such as water ...
... positive ion from one ionic compound exchanges with positive ion of another ionic compound, always have 2 compounds for reactants, usually occurs in aqueous solution and results in either formation of a precipitate, production of a gas, or formation of a molecular compound such as water ...
9182747 Chemistry Ja02
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
Using mass to calculate molecular formula
... Empirical formula and Molecular formula Benzene consists of 7.69% H and 92.31%C. Converting this to a formula gives CH. This is the simplest integer ratio. In fact a molecule of benzene has the formula C6H6. Empirical formula CH – simplest whole number ratio. Molecular formula C6H6 – actual number o ...
... Empirical formula and Molecular formula Benzene consists of 7.69% H and 92.31%C. Converting this to a formula gives CH. This is the simplest integer ratio. In fact a molecule of benzene has the formula C6H6. Empirical formula CH – simplest whole number ratio. Molecular formula C6H6 – actual number o ...
key
... 103) Compare the elements Li, K, C, N a) Which has the largest atomic radius? K b) Place the elements in order of increasing ionization energy. K < Li < C < N 109) Which group of the periodic table has elements with high first ionization potentials and very negative electron affinities? Explain this ...
... 103) Compare the elements Li, K, C, N a) Which has the largest atomic radius? K b) Place the elements in order of increasing ionization energy. K < Li < C < N 109) Which group of the periodic table has elements with high first ionization potentials and very negative electron affinities? Explain this ...
Chemistry II Demonstration Assessment
... Background Information: Chemical reactions occur when atoms are separated, rearranged, and/or joined in a new way. In this experiment you will decompose the chemical compound you synthesized in the laboratory yesterday. Energy is always required to break the bonds of a compound. You will use a 9 vol ...
... Background Information: Chemical reactions occur when atoms are separated, rearranged, and/or joined in a new way. In this experiment you will decompose the chemical compound you synthesized in the laboratory yesterday. Energy is always required to break the bonds of a compound. You will use a 9 vol ...
Fall Exam 4 - Chemistry - University of Kentucky
... Starting with answer "1" on SIDE 1, fill in the circle indicating the one best answer for each of the 60 questions in this examination. Your score is the sum of the appropriate credit for each response. Soon after the examination is finished, an examination key will be posted on Blackboard. Grading ...
... Starting with answer "1" on SIDE 1, fill in the circle indicating the one best answer for each of the 60 questions in this examination. Your score is the sum of the appropriate credit for each response. Soon after the examination is finished, an examination key will be posted on Blackboard. Grading ...
Thermochemistry: The Heat of Neutralization
... The amount of heat exchanged during a reaction is called the heat of reaction, q. The enthalpy change of a reaction, ∆H, is the heat of a reaction at constant pressure, usually calculated in units of kJ/mol. Endothermic reactions are assigned a positive enthalpy value (∆H > 0) and exothermic reactio ...
... The amount of heat exchanged during a reaction is called the heat of reaction, q. The enthalpy change of a reaction, ∆H, is the heat of a reaction at constant pressure, usually calculated in units of kJ/mol. Endothermic reactions are assigned a positive enthalpy value (∆H > 0) and exothermic reactio ...
Regents questions
... Go figure – Notice that germanium, Ge is a metalloid but tin, Sn, is a metal. What changes in atomic properties do you think are important in explaining this difference? Give it some thought – Describe the relationship between the trends in metallic character and trends in ionization energy: ...
... Go figure – Notice that germanium, Ge is a metalloid but tin, Sn, is a metal. What changes in atomic properties do you think are important in explaining this difference? Give it some thought – Describe the relationship between the trends in metallic character and trends in ionization energy: ...
Covalent Bonding - Effingham County Schools
... •Electron-dot notation is an electronconfiguration notation in which only the valence electrons of an atom or a particular element are shown, indicated by dots placed around the element’s symbol. Hydrogen has 1 valence electron so one dot is placed around the ...
... •Electron-dot notation is an electronconfiguration notation in which only the valence electrons of an atom or a particular element are shown, indicated by dots placed around the element’s symbol. Hydrogen has 1 valence electron so one dot is placed around the ...
Test - Chemical Bonding- Practice Test
... 23) _____________ -Bonding occurs when there is a transfer valence electrons 24) _____________- Bonding occurs between nonmetals and metals 25) _____________- Compounds have relatively weak force of attraction between molecules 26) _____________- Bonding occurs between nonmetals and nonmetals 27) __ ...
... 23) _____________ -Bonding occurs when there is a transfer valence electrons 24) _____________- Bonding occurs between nonmetals and metals 25) _____________- Compounds have relatively weak force of attraction between molecules 26) _____________- Bonding occurs between nonmetals and nonmetals 27) __ ...
CH. 15 Notes
... to the right of the chemical symbols are called Subscripts, and notes the number of atoms of that element. A number in front of a chemical formula is a coefficient and it is multiplied by the subscript of all the atoms that are in the formula ...
... to the right of the chemical symbols are called Subscripts, and notes the number of atoms of that element. A number in front of a chemical formula is a coefficient and it is multiplied by the subscript of all the atoms that are in the formula ...
2007 - SolPass
... electronic or mechanical, including photocopying or recording, or by any information storage or retrieval system, without written permission from the copyright owner. Commonwealth of Virginia public school educators may reproduce any portion of these released tests for non-commercial educational pur ...
... electronic or mechanical, including photocopying or recording, or by any information storage or retrieval system, without written permission from the copyright owner. Commonwealth of Virginia public school educators may reproduce any portion of these released tests for non-commercial educational pur ...
Things to Know to Pass the Chemistry Regents
... 130. Reaction will occur spontaneously if toward lower energy and greater entropy ...
... 130. Reaction will occur spontaneously if toward lower energy and greater entropy ...
Chapter 8 - Chemical Equations
... Step 1 – Look at the element by itself. Is this element a metal or a nonmetal? Al (aluminum) is a metal because it is located to the left side of the staircase line on the Periodic Table. Step 2 – You will compare the type of element by itself to the similar type of element in the compound. In this ...
... Step 1 – Look at the element by itself. Is this element a metal or a nonmetal? Al (aluminum) is a metal because it is located to the left side of the staircase line on the Periodic Table. Step 2 – You will compare the type of element by itself to the similar type of element in the compound. In this ...
Chapter 2 Chemical context of Life
... Atoms with incomplete valence shells interact with certain other atoms in such a way that each partner completes its valence shell. Atoms do this by either sharing or transferring valence electrons. Atoms may combine chemically, bond, to form molecules. ...
... Atoms with incomplete valence shells interact with certain other atoms in such a way that each partner completes its valence shell. Atoms do this by either sharing or transferring valence electrons. Atoms may combine chemically, bond, to form molecules. ...
Tutorial 7
... Chlorine has been used for decades to disinfect drinking water. An undesirable side effect of this treatment is the reaction of chlorine with organic impurities to create organochlorine compounds, some of which could be toxic. Monitoring total organic halide is now required for many water providers. ...
... Chlorine has been used for decades to disinfect drinking water. An undesirable side effect of this treatment is the reaction of chlorine with organic impurities to create organochlorine compounds, some of which could be toxic. Monitoring total organic halide is now required for many water providers. ...
Chemical Reactions (L1)
... form (Fe), and substance “B” is an element in molecular form (O2). The result is a direct chemical combination of the two elements (FeO, iron oxide, which is “rust”). ...
... form (Fe), and substance “B” is an element in molecular form (O2). The result is a direct chemical combination of the two elements (FeO, iron oxide, which is “rust”). ...
Test - Regents
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
Dr. Audrey Lugo`s AP Chemistry Course Syllabus
... 1. Types of solutions and factors affecting solubility 2. Methods of expressing concentration (The use of normalities is not tested.) 3. Raoult’s law and colligative properties (nonvolatile solutes); osmosis 4. Non-ideal behavior (qualitative aspects) III. Reactions (35–40%) A. Reaction types 1. Aci ...
... 1. Types of solutions and factors affecting solubility 2. Methods of expressing concentration (The use of normalities is not tested.) 3. Raoult’s law and colligative properties (nonvolatile solutes); osmosis 4. Non-ideal behavior (qualitative aspects) III. Reactions (35–40%) A. Reaction types 1. Aci ...
study guide first semester chemistry
... following: a. CCl4 (tetrahedral nonpolar) b. HNO3 (trigonal pyramidal polar) c. SF6 (octahedral nonpolar) 3. Describe how a hybrid orbital is formed. ( energy sublevels combine to make more bonding sites) Chapter 9 Chemical Reactions and Equations Summary: ...
... following: a. CCl4 (tetrahedral nonpolar) b. HNO3 (trigonal pyramidal polar) c. SF6 (octahedral nonpolar) 3. Describe how a hybrid orbital is formed. ( energy sublevels combine to make more bonding sites) Chapter 9 Chemical Reactions and Equations Summary: ...
Types of Chemical Reactions (rxns.)
... A metal can replace a metal (+) OR a nonmetal can replace a nonmetal (-). element + compoundà product + product A + BC à AC + B (if A is a metal) OR A + BC à BA + C (if A is a nonmetal) (remember the cation always goes first!) ...
... A metal can replace a metal (+) OR a nonmetal can replace a nonmetal (-). element + compoundà product + product A + BC à AC + B (if A is a metal) OR A + BC à BA + C (if A is a nonmetal) (remember the cation always goes first!) ...
Unit 2 Review for Test
... 40. What elements make up a protein? 42. Name the building blocks of lipids. 43. Draw a structural diagram showing a simple representation of a fatty acid.. 44. List some types of lipids. 45. Name the primary use of the type of macromolecule which is a source of energy. 46. Name the macromolecule wh ...
... 40. What elements make up a protein? 42. Name the building blocks of lipids. 43. Draw a structural diagram showing a simple representation of a fatty acid.. 44. List some types of lipids. 45. Name the primary use of the type of macromolecule which is a source of energy. 46. Name the macromolecule wh ...
Redox
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.