FE Exam review for Chemistry
... How do you calculate average atomic mass? Average atomic mass is a weighted average of the masses of all isotopes. Avg atomic mass = sum of all isotope (frequency)(mass) What’s the difference between an atom and an ion? Atoms are not charged because they have equal numbers of protons & e-. Ions are ...
... How do you calculate average atomic mass? Average atomic mass is a weighted average of the masses of all isotopes. Avg atomic mass = sum of all isotope (frequency)(mass) What’s the difference between an atom and an ion? Atoms are not charged because they have equal numbers of protons & e-. Ions are ...
Chemistry - Kendriya Vidyalaya Raigarh
... Bond Order: In the Lewis description of covalent bond, the Bond Order is given by the number of bonds between the two atoms in a molecule Resonance:whenever a single Lewis structure cannot describe a molecule accurately, a number of structures with similar energy, positions of nuclei, bonding and no ...
... Bond Order: In the Lewis description of covalent bond, the Bond Order is given by the number of bonds between the two atoms in a molecule Resonance:whenever a single Lewis structure cannot describe a molecule accurately, a number of structures with similar energy, positions of nuclei, bonding and no ...
Organic Naming Notes
... - In this example there is a chain with 9 (nonane) 2. Number the chain starting with one that will give the attached groups (substituent group) the lowest number. 3. Add numbers of the parent chain carbon bonded to the names of the substituent group ...
... - In this example there is a chain with 9 (nonane) 2. Number the chain starting with one that will give the attached groups (substituent group) the lowest number. 3. Add numbers of the parent chain carbon bonded to the names of the substituent group ...
Syracuse University
... ACADEMIC INTEGRITY: The Syracuse University Academic Integrity Policy holds students accountable for the integrity of the work they submit. Students should be familiar with the Policy and know that it is their responsibility to learn about instructor and general academic expectations with regard to ...
... ACADEMIC INTEGRITY: The Syracuse University Academic Integrity Policy holds students accountable for the integrity of the work they submit. Students should be familiar with the Policy and know that it is their responsibility to learn about instructor and general academic expectations with regard to ...
SAT - mvhs-fuhsd.org
... • DO NOT CRAM. Get your studying done with by the night before. Get a good night’s sleep and have breakfast the morning of the exam. • Actively participate in any and all review classes and activities offered by your teacher. ...
... • DO NOT CRAM. Get your studying done with by the night before. Get a good night’s sleep and have breakfast the morning of the exam. • Actively participate in any and all review classes and activities offered by your teacher. ...
Fall 2008 Blank Exam 1 - Department of Chemistry | Oregon State
... There are six significant figures in this measured quantity. There are five significant figures in this measured quantity. There are four significant figures in this measured quantity. There are three significant figures in this measured quantity. There are two significant figures in this measured q ...
... There are six significant figures in this measured quantity. There are five significant figures in this measured quantity. There are four significant figures in this measured quantity. There are three significant figures in this measured quantity. There are two significant figures in this measured q ...
- TestbankU
... 39) Suppose that a particular chemical substance is "pure" [contains no "impurities"], and that it is not possible to decompose this substance by chemical means. What can we conclude from this? A) The substance must be incapable of entering into chemical reactions of any kind. B) The substance must ...
... 39) Suppose that a particular chemical substance is "pure" [contains no "impurities"], and that it is not possible to decompose this substance by chemical means. What can we conclude from this? A) The substance must be incapable of entering into chemical reactions of any kind. B) The substance must ...
File
... • Hydrocarbons are compounds that contain only carbon and hydrogen. There are three main classes of hydrocarbons, based on the types of carbon–carbon bonds present. 1-Saturated hydrocarbons contain only carbon–carbon single bonds. 2-Unsaturated hydrocarbons contain carbon–carbon multiple bonds, dou ...
... • Hydrocarbons are compounds that contain only carbon and hydrogen. There are three main classes of hydrocarbons, based on the types of carbon–carbon bonds present. 1-Saturated hydrocarbons contain only carbon–carbon single bonds. 2-Unsaturated hydrocarbons contain carbon–carbon multiple bonds, dou ...
end of year review
... D. not enough information is give to answer this question _____13. When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions? A. They have extra mass. B. They have a l ...
... D. not enough information is give to answer this question _____13. When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions? A. They have extra mass. B. They have a l ...
Chapter 2: Atoms, Molecules, and Ions
... E) tend to gain electrons in chemical reactions 43. All of the following are characteristics of nonmetals except: A) poor conductors of electricity B) often bond to each other by forming covalent bonds C) tend to form negative ions in chemical reactions with metals D) appear in the upper left-hand c ...
... E) tend to gain electrons in chemical reactions 43. All of the following are characteristics of nonmetals except: A) poor conductors of electricity B) often bond to each other by forming covalent bonds C) tend to form negative ions in chemical reactions with metals D) appear in the upper left-hand c ...
SC 119 PRACTICE Assessment:
... h) At room temperature (72 oF) propane is a gas and water is a liquid. This means that 72 oF must be higher than the boiling point for propane, but lower than the boiling point for water. Explain why propane has a lower boiling point than water. Provide an analysis of the interparticle forces betwee ...
... h) At room temperature (72 oF) propane is a gas and water is a liquid. This means that 72 oF must be higher than the boiling point for propane, but lower than the boiling point for water. Explain why propane has a lower boiling point than water. Provide an analysis of the interparticle forces betwee ...
Chemical Bonding and Molecular Geometry
... a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: ...
... a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: ...
N5 Chemistry Summary notes 2017
... Atoms of the same element always have the number of protons but the number of electrons can change when a compound is formed. This gives the atom a charge and we call it an ion. Metal atoms form positive ions Non-metal atoms form negative ions. Positive and negative ions are found together in some c ...
... Atoms of the same element always have the number of protons but the number of electrons can change when a compound is formed. This gives the atom a charge and we call it an ion. Metal atoms form positive ions Non-metal atoms form negative ions. Positive and negative ions are found together in some c ...
File
... The reaction of methane and water is one way to prepare hydrogen. CH4(g) + 2 H2O(g) CO2(g) + 4 H2(g) If 0.320 mol of methane reacts with 0.530 mol of water, what is the limiting reagent? a. CH4(g) c. H2(g) b. CO2(g) d. H2O(g) ...
... The reaction of methane and water is one way to prepare hydrogen. CH4(g) + 2 H2O(g) CO2(g) + 4 H2(g) If 0.320 mol of methane reacts with 0.530 mol of water, what is the limiting reagent? a. CH4(g) c. H2(g) b. CO2(g) d. H2O(g) ...
76 kJ/mole
... • Understand the purpose & function of thermodynamic reaction energy profiles • To gain additional appreciation as to why atoms of elements like to react chemically • Review the shapes and spatial orientation of probability maps for finding electrons. These are: • atomic orbitals, AO’s • hybrid orbi ...
... • Understand the purpose & function of thermodynamic reaction energy profiles • To gain additional appreciation as to why atoms of elements like to react chemically • Review the shapes and spatial orientation of probability maps for finding electrons. These are: • atomic orbitals, AO’s • hybrid orbi ...
Chemistry Note PowerPoint
... • An atom’s valance electrons are those that have the highest energy levels and are held most loosely. • The number of valance electrons determine many properties of that element, including the ways in which the atom combines with other atoms ...
... • An atom’s valance electrons are those that have the highest energy levels and are held most loosely. • The number of valance electrons determine many properties of that element, including the ways in which the atom combines with other atoms ...
Unit 2 PowerPoint part 2
... * What is the mass of 2.50 moles of oxygen gas? * How many moles are in 1.204 x 1025 molecules of SO3? ...
... * What is the mass of 2.50 moles of oxygen gas? * How many moles are in 1.204 x 1025 molecules of SO3? ...
Chapter 7 - Chemical Quantities
... Chapter 7 - Chemical Quantities Recall all learning maps so far. ...
... Chapter 7 - Chemical Quantities Recall all learning maps so far. ...
PPTB&W - Gmu - George Mason University
... Group 3A – Boron Family (ns2np1) Relative Basicity of Group 3 oxides ● Recall: A1 oxides (ionic charge +1 and more metallic) are more basic than A2 oxides (ionic charge +2 and less metallic) ● In general, oxides with the element in a lower oxidation state (less positive) are more basic than oxide ...
... Group 3A – Boron Family (ns2np1) Relative Basicity of Group 3 oxides ● Recall: A1 oxides (ionic charge +1 and more metallic) are more basic than A2 oxides (ionic charge +2 and less metallic) ● In general, oxides with the element in a lower oxidation state (less positive) are more basic than oxide ...
Group 2 - UC Davis Canvas
... 9. 3 XeF4(aq) + 6 H2O(l) → 2 Xe(g) + 3/2 O2(g) + 12 HF(g) + XeO3(s) 11. The bond energy of the noble gas fluorine is too small to offset the energy required to break the F—F bond. 13. Iodide ion is slowly oxidized to iodine, which is yellow-brown in aqueous solution, by oxygen in the air: 4 I − ( aq ...
... 9. 3 XeF4(aq) + 6 H2O(l) → 2 Xe(g) + 3/2 O2(g) + 12 HF(g) + XeO3(s) 11. The bond energy of the noble gas fluorine is too small to offset the energy required to break the F—F bond. 13. Iodide ion is slowly oxidized to iodine, which is yellow-brown in aqueous solution, by oxygen in the air: 4 I − ( aq ...
PPT - George Mason University
... Other group members are metals – shiny, relatively soft with low melting points Aluminum is more ionic; its low density and 3 valence electrons make it a good electrical conductor Although Aluminum is a metal, its halides exist in the gaseous state as covalent dimers - AL2Cl6 (contrast salts of grou ...
... Other group members are metals – shiny, relatively soft with low melting points Aluminum is more ionic; its low density and 3 valence electrons make it a good electrical conductor Although Aluminum is a metal, its halides exist in the gaseous state as covalent dimers - AL2Cl6 (contrast salts of grou ...
H - JMap
... Na + H2O Æ H2 + NaOH When the equation is correctly balanced using the smallest whole-number coefficients, the coefficient for H2O is ...
... Na + H2O Æ H2 + NaOH When the equation is correctly balanced using the smallest whole-number coefficients, the coefficient for H2O is ...
- skv institute
... Kossel and Lewis in 1916 developed an important theory of chemical combination between atoms known as electronic theory of chemical bonding. According to this - atoms can combine either by transfer of valence electrons from one atom to another (gaining or losing) or by sharing of valence electrons ...
... Kossel and Lewis in 1916 developed an important theory of chemical combination between atoms known as electronic theory of chemical bonding. According to this - atoms can combine either by transfer of valence electrons from one atom to another (gaining or losing) or by sharing of valence electrons ...
Resonance (chemistry)
In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis formula. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms).Each contributing structure can be represented by a Lewis structure, with only an integer number of covalent bonds between each pair of atoms within the structure. Several Lewis structures are used collectively to describe the actual molecular structure, which is an approximate intermediate between the canonical forms called a resonance hybrid. Contributing structures differ only in the position of electrons, not in the position of nuclei.Electron delocalization lowers the potential energy of the substance and thus makes it more stable than any of the contributing structures. The difference between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the resonance energy or delocalization energy.Resonance is distinguished from tautomerism and conformational isomerism, which involve the formation of isomers, thus the rearrangement of the nuclear positions.