Organic and Bio-Molecular Chemistry
... are monovalent, they can establish only one linkage; oxygen is bivalent, it establishes two linkages; nitrogen, boron and aluminum are trivalent, they can establish three linkages with different atoms. Therefore silicon and carbon, the two abundant tetravalent elements, are the most efficient scaffo ...
... are monovalent, they can establish only one linkage; oxygen is bivalent, it establishes two linkages; nitrogen, boron and aluminum are trivalent, they can establish three linkages with different atoms. Therefore silicon and carbon, the two abundant tetravalent elements, are the most efficient scaffo ...
apchem - practice midterm_shs
... Many candidates wonder whether or not to guess the answers to questions about which they are uncertain. In this section of the examination, as a correction for haphazard guessing, one-fourth of the number of questions you answer incorrectly will be subtracted from the number of questions you answer ...
... Many candidates wonder whether or not to guess the answers to questions about which they are uncertain. In this section of the examination, as a correction for haphazard guessing, one-fourth of the number of questions you answer incorrectly will be subtracted from the number of questions you answer ...
Summaries of Review Topics for AP Chemistry
... Rule #1: Identify and name acids: acids are covalent compounds which formulas start with H (except H2O and H2O2). Find their name in the “Names and Formulas of Acids” below. If the acid is made with a polyatomic ion, change the ending of the ion from –ate to –ic, or from –ite to –ous and add acid to ...
... Rule #1: Identify and name acids: acids are covalent compounds which formulas start with H (except H2O and H2O2). Find their name in the “Names and Formulas of Acids” below. If the acid is made with a polyatomic ion, change the ending of the ion from –ate to –ic, or from –ite to –ous and add acid to ...
Chapter 3 – Stoichiometry of Formulas and Equations This chapter
... This chapter addresses two basic concepts: 1) the masses of molecules and salts at both the atomic and macroscopic levels and 2) the number relationship between reacting species. 3.1 The Mole You were introduced briefly to the atomic mass unit in the previous chapter as a convenient way of discussin ...
... This chapter addresses two basic concepts: 1) the masses of molecules and salts at both the atomic and macroscopic levels and 2) the number relationship between reacting species. 3.1 The Mole You were introduced briefly to the atomic mass unit in the previous chapter as a convenient way of discussin ...
FINAL REVIEW Vella Name_______________ Period___
... 2. Nitrogen gas is collected over water at a temperature of 40 degrees Celsius ( v.p. of H2O = 7.38 kPa). The water levels inside and outside the collecting bottle are equal at the end of the experiment. Calculate the pressure of the nitrogen gas if the atmospheric pressure = 97.3 kPa. ...
... 2. Nitrogen gas is collected over water at a temperature of 40 degrees Celsius ( v.p. of H2O = 7.38 kPa). The water levels inside and outside the collecting bottle are equal at the end of the experiment. Calculate the pressure of the nitrogen gas if the atmospheric pressure = 97.3 kPa. ...
PPT - Unit 5
... 2 CH4 + O2 2 CH3OH ΔHrxn = -328 kJ 2 CH3OH 2 CH4 + O2 ΔHrxn = +328 kJ 2. If the coefficients of a reaction are multiplied by an integer, ΔH is multiplied by that same integer CH4 + 2 O2 CO2 + 2 H2O 2(CH4 + 2 O2 CO2 + 2 H2O) ...
... 2 CH4 + O2 2 CH3OH ΔHrxn = -328 kJ 2 CH3OH 2 CH4 + O2 ΔHrxn = +328 kJ 2. If the coefficients of a reaction are multiplied by an integer, ΔH is multiplied by that same integer CH4 + 2 O2 CO2 + 2 H2O 2(CH4 + 2 O2 CO2 + 2 H2O) ...
2005/6 - SAASTA
... Aqueous solutions with pH values lower than 7 are considered acidic, while pH values higher than 7 are considered basic. The concept was introduced by S.P.L. Sørensen in 1909, and is purported to mean "pondus hydrogenii" in Latin. However, most other sources attribute the name to the French term pou ...
... Aqueous solutions with pH values lower than 7 are considered acidic, while pH values higher than 7 are considered basic. The concept was introduced by S.P.L. Sørensen in 1909, and is purported to mean "pondus hydrogenii" in Latin. However, most other sources attribute the name to the French term pou ...
3: Haloalkanes, Alcohols, Ethers, and Amines
... F attracts electrons more than C in C-F bonds because the electronegativity of F (3.9) is much greater than that of C (2.5). In contrast, C-H bonds are not very polar because the electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences ...
... F attracts electrons more than C in C-F bonds because the electronegativity of F (3.9) is much greater than that of C (2.5). In contrast, C-H bonds are not very polar because the electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences ...
Print out Reviews # 1 through # 17
... 4. Draw the electron dot diagrams for the following elements. (A) argon (B) phosphorus (C) sodium (D) silicon (E) aluminum (F) bromine EOC REVIEW #5 1. How is an element’s outer electron configuration related to its position on the Periodic Table? 2. What are the symbols for all of the elements that ...
... 4. Draw the electron dot diagrams for the following elements. (A) argon (B) phosphorus (C) sodium (D) silicon (E) aluminum (F) bromine EOC REVIEW #5 1. How is an element’s outer electron configuration related to its position on the Periodic Table? 2. What are the symbols for all of the elements that ...
File - Meissnerscience.com
... A common technique employed by chemists to help them identify the make-up of an unknown substance is the test for percent composition. Experimentally, one can determine the composition by mass of a substance and then convert the mass amounts to percentages. Percent composition for a compound will al ...
... A common technique employed by chemists to help them identify the make-up of an unknown substance is the test for percent composition. Experimentally, one can determine the composition by mass of a substance and then convert the mass amounts to percentages. Percent composition for a compound will al ...
- Catalyst
... Step 1) Assign oxidation numbers to all elements in the equation. Step 2) From the changes in oxidation numbers, identify the oxidized and reduced species. Step 3) Compute the number of electrons lost in the oxidation and gained in the reduction from the oxidation number changes. Draw tie-lines betw ...
... Step 1) Assign oxidation numbers to all elements in the equation. Step 2) From the changes in oxidation numbers, identify the oxidized and reduced species. Step 3) Compute the number of electrons lost in the oxidation and gained in the reduction from the oxidation number changes. Draw tie-lines betw ...
Types of Reactions and Solution Chemistry
... ability to react with each other. According to the Arrhenius theory, pure water dissociates to some extent to produce hydrogen ions, H+ and hydroxide ions, OH-. When this occurs, equal amounts of H+ and OH- ions are produced: H2O(l) H+(aq) + OH-(aq) An acid, according to Arrhenius, is any substanc ...
... ability to react with each other. According to the Arrhenius theory, pure water dissociates to some extent to produce hydrogen ions, H+ and hydroxide ions, OH-. When this occurs, equal amounts of H+ and OH- ions are produced: H2O(l) H+(aq) + OH-(aq) An acid, according to Arrhenius, is any substanc ...
CHEM 1211 and CHEM 1212 National ACS Exams About the Exam
... 2. Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of energy? a) 10.0 g Ag, CAg = 0.235 J/g°C b) 10.0 g H2O, CH2O = 4.18 J/g°C c) 10.0 g ethanol, Cethanol = 2.42 J/g°C d) 10.0 g Fe, CFe = 0.449 J/g°C e) ...
... 2. Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of energy? a) 10.0 g Ag, CAg = 0.235 J/g°C b) 10.0 g H2O, CH2O = 4.18 J/g°C c) 10.0 g ethanol, Cethanol = 2.42 J/g°C d) 10.0 g Fe, CFe = 0.449 J/g°C e) ...
3: Haloalkanes, Alcohols, Ethers, and Amines
... F attracts electrons more than C in C-F bonds because the electronegativity of F (3.9) is much greater than that of C (2.5). In contrast, C-H bonds are not very polar because the electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences ...
... F attracts electrons more than C in C-F bonds because the electronegativity of F (3.9) is much greater than that of C (2.5). In contrast, C-H bonds are not very polar because the electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences ...
Classifying Chemical Reactions by What Atoms Do
... must gain or lose electrons (of course, if one atom loses electrons, another must accept them). Atoms that lose electrons are being oxidized, atoms that gain electrons are being reduced. ...
... must gain or lose electrons (of course, if one atom loses electrons, another must accept them). Atoms that lose electrons are being oxidized, atoms that gain electrons are being reduced. ...
1 Lecture 11. Redox Chemistry Many elements in the periodic table
... Steps for relating half-reaction voltages and activities from the Nernst Equation (4 or 5): Write a balanced half-reaction (see below rules in assigning oxidation numbers). Determine DGr° (from tabulated DGf° values, using molar coefficients and DGf° of e- = 0) Determine Eho from DGr°, or a given va ...
... Steps for relating half-reaction voltages and activities from the Nernst Equation (4 or 5): Write a balanced half-reaction (see below rules in assigning oxidation numbers). Determine DGr° (from tabulated DGf° values, using molar coefficients and DGf° of e- = 0) Determine Eho from DGr°, or a given va ...
pdfInt 2 Homework Unit 2 1 MB
... Name the type of chemical reaction which takes place when iodine (2.22) reacts with propene. ...
... Name the type of chemical reaction which takes place when iodine (2.22) reacts with propene. ...
Course Pack3 Phase Diagrams
... HCl and HI are highly soluble in H2O. Why? Because HCl and HI dissociate completely to make H H ...
... HCl and HI are highly soluble in H2O. Why? Because HCl and HI dissociate completely to make H H ...