Targets of Opportunity
... Yesterday, July 9, an explosion occurred at a Texas oil refinery which resulted in the release of an unspecified, but potentially large amount of hydrogen fluoride. According to the article which appeared in today's Corpus Christi Caller Times, a seven block area adjacent to the plant was soon evacu ...
... Yesterday, July 9, an explosion occurred at a Texas oil refinery which resulted in the release of an unspecified, but potentially large amount of hydrogen fluoride. According to the article which appeared in today's Corpus Christi Caller Times, a seven block area adjacent to the plant was soon evacu ...
practice-exam-2
... 15. [7 points] Which of the following equations is the balanced chemical equation representing the combustion of propanol (C3H7OH)? (a) C3H7OH (l) + 9O(g) � 3CO2(g) + 4H2O(l) (b) C3H7OH (l) � 3CO2(g) + 4H2O(l) (c) C3H7OH (l) � CO(g) + 4H2(g) + 2C(s) (d) 2C3H7OH (l) + 9O2(g) � 6CO2(g) + 8H2O(l) (e) C ...
... 15. [7 points] Which of the following equations is the balanced chemical equation representing the combustion of propanol (C3H7OH)? (a) C3H7OH (l) + 9O(g) � 3CO2(g) + 4H2O(l) (b) C3H7OH (l) � 3CO2(g) + 4H2O(l) (c) C3H7OH (l) � CO(g) + 4H2(g) + 2C(s) (d) 2C3H7OH (l) + 9O2(g) � 6CO2(g) + 8H2O(l) (e) C ...
Answer Key
... A) a charged atom or group of atoms with a net negative charge. B) a stable atom. C) a group of stable atoms. D) an atom or group of atoms with a net positive charge. ...
... A) a charged atom or group of atoms with a net negative charge. B) a stable atom. C) a group of stable atoms. D) an atom or group of atoms with a net positive charge. ...
Take Home - mvhs
... suspected of being this illicit drug; when tested, the sample was shown to have a percentage composition of 83.71% C, 10.42% H, and 5.61% N. Prove if this sample is phencyclidine. (2 pts work, 1 pt correct answer, 1 pt correct sig figs) ...
... suspected of being this illicit drug; when tested, the sample was shown to have a percentage composition of 83.71% C, 10.42% H, and 5.61% N. Prove if this sample is phencyclidine. (2 pts work, 1 pt correct answer, 1 pt correct sig figs) ...
Elements
... Atoms are indivisible in chemical processes. They are not created or destroyed in a chemical process. A chemical reaction simply changes the way atoms are ...
... Atoms are indivisible in chemical processes. They are not created or destroyed in a chemical process. A chemical reaction simply changes the way atoms are ...
Seminar 1 - Univerzita Karlova v Praze
... • shows the total number of electrons which have been removed from an element (= positive ox. state) or added to an element (= negative ox. state) to get to its present state • Oxidation = an increase in ox. state (loss of electrons) • Reduction = a decrease in ox. state (receiving of electrons) • E ...
... • shows the total number of electrons which have been removed from an element (= positive ox. state) or added to an element (= negative ox. state) to get to its present state • Oxidation = an increase in ox. state (loss of electrons) • Reduction = a decrease in ox. state (receiving of electrons) • E ...
What is hydrogen peroxide?
... QUESTIONS TO ANSWER Look at the formulae for water and hydrogen peroxide. What elements are in each of these compounds? __________________________ and _______________________________ ...
... QUESTIONS TO ANSWER Look at the formulae for water and hydrogen peroxide. What elements are in each of these compounds? __________________________ and _______________________________ ...
Answer Key Quiz 6 Prep 40 Questions About the Group V through
... D. (I), (II), (III), (IV) and (VI) Answer: B 5) Which of the following statements about adenosine triphosphate are true? (I) It is found in every living cell. (II) It is found in most living cells. (III) A large amount of energy is released when it is converted to adenosine diphosphate. (IV) A water ...
... D. (I), (II), (III), (IV) and (VI) Answer: B 5) Which of the following statements about adenosine triphosphate are true? (I) It is found in every living cell. (II) It is found in most living cells. (III) A large amount of energy is released when it is converted to adenosine diphosphate. (IV) A water ...
Understanding the Properties of Elements – Chapter 5
... Molecular Compounds (Covalent Compounds) Molecular compounds are made up of ___________ ________ instead of ions. Instead of electrons being transferred from one atom to the other, they are _______. Strong _______ _ _________ are formed when electrons are shared. Electrons are shared so that each a ...
... Molecular Compounds (Covalent Compounds) Molecular compounds are made up of ___________ ________ instead of ions. Instead of electrons being transferred from one atom to the other, they are _______. Strong _______ _ _________ are formed when electrons are shared. Electrons are shared so that each a ...
Lecture 11 - AP Chem Solutions
... compounds containing group 1A ions, nitrate, and ammonium are always soluble. 2) A potassium hydroxide solution is mixed with a solution of zinc nitrate. The potassium ion is always soluble as it is a Group 1A element. Nitrate is also soluble with everything. Thus, K+ and NO3- must be spectator ions ...
... compounds containing group 1A ions, nitrate, and ammonium are always soluble. 2) A potassium hydroxide solution is mixed with a solution of zinc nitrate. The potassium ion is always soluble as it is a Group 1A element. Nitrate is also soluble with everything. Thus, K+ and NO3- must be spectator ions ...
Unit 9 The p-Block Elements
... (1)Characteristic properties of the halogens The Group VII elements, the halogens, are reactive non-metals. They have the electronic structure ns2 np5 for their valence shells. Halogens exist as diatomic molecules, X2. The first element in the group, fluorine, is anomalous, just as lithium and beryl ...
... (1)Characteristic properties of the halogens The Group VII elements, the halogens, are reactive non-metals. They have the electronic structure ns2 np5 for their valence shells. Halogens exist as diatomic molecules, X2. The first element in the group, fluorine, is anomalous, just as lithium and beryl ...
unit 4 hw packet File
... Metalloids often make up the semiconductors found in electronic devices. Metalloids are B, Si, Ge, As, Sb, Te, At. Alkali Metals: Group 1, like metals but HIGHLY REACTIVE. Soft, shiny, silver-white, good conductors. Have one e- in their outer energy level which they like to give up. Never found unco ...
... Metalloids often make up the semiconductors found in electronic devices. Metalloids are B, Si, Ge, As, Sb, Te, At. Alkali Metals: Group 1, like metals but HIGHLY REACTIVE. Soft, shiny, silver-white, good conductors. Have one e- in their outer energy level which they like to give up. Never found unco ...
c2 atomic structure f pmh
... A lithium atom can lose one electron to form a lithium ion which can be written (2)+ A fluorine atom can gain one electron to form a fluoride ion. Choose from the list the correct way to write the fluoride ion. ...
... A lithium atom can lose one electron to form a lithium ion which can be written (2)+ A fluorine atom can gain one electron to form a fluoride ion. Choose from the list the correct way to write the fluoride ion. ...
Review Package
... 26) a) If apple juice has a pH of 5 and vinegar has a pH of 3, which is more acidic? __________________ b) How many more hydrogen ions are there in the more acidic substance? ____________________ 27) How much more acidic is a solution with a pH of 4.5 than a solution with a pH of a) 5.5? b) 6.5? 28) ...
... 26) a) If apple juice has a pH of 5 and vinegar has a pH of 3, which is more acidic? __________________ b) How many more hydrogen ions are there in the more acidic substance? ____________________ 27) How much more acidic is a solution with a pH of 4.5 than a solution with a pH of a) 5.5? b) 6.5? 28) ...
Chapter 14 Review Question Answers
... The attachment of an electron negative fluorine atom to the C-2 carbon of valproic acid molecule would avert its metabolism via β-oxidation and thus prevents formation of the toxic metabolite, (E)-2, 4-diene-VPA from 4-ene-VPA. The reason for this observation is that a carbon fluorine bond is very s ...
... The attachment of an electron negative fluorine atom to the C-2 carbon of valproic acid molecule would avert its metabolism via β-oxidation and thus prevents formation of the toxic metabolite, (E)-2, 4-diene-VPA from 4-ene-VPA. The reason for this observation is that a carbon fluorine bond is very s ...
Vocabulary CHEM121
... Acids: anything giving H+ when dissolved in water Bases: anything giving OH- when dissolved in water Salts: all other ionic materials Formulas of molecular/covalent compounds: Non-metals can combine with other non-metals to form molecules. Molecules are covalently bonded groups of atoms—they do not ...
... Acids: anything giving H+ when dissolved in water Bases: anything giving OH- when dissolved in water Salts: all other ionic materials Formulas of molecular/covalent compounds: Non-metals can combine with other non-metals to form molecules. Molecules are covalently bonded groups of atoms—they do not ...
CHM 212 - The Federal University of Agriculture, Abeokuta
... F2, Cl2 and Br2 will oxidise Fe2+ to Fe3+ but not I2. The electrode potential becomes less positive from fluorine to iodine, reflecting decreasing oxidizing power. FLUORINE Fluorine is different from other halogen because of 1. Inability of F to exhibit oxidation state other than -1 in its compounds ...
... F2, Cl2 and Br2 will oxidise Fe2+ to Fe3+ but not I2. The electrode potential becomes less positive from fluorine to iodine, reflecting decreasing oxidizing power. FLUORINE Fluorine is different from other halogen because of 1. Inability of F to exhibit oxidation state other than -1 in its compounds ...
Word and Skeleton Equations Practice (ws Fall 2010)
... Write the WORD and SKELETON equations for each chemical reaction. Indicate the state of each reactant and product in the skeleton equation. Remember that the following seven elements are diatomic: hydrogen, H2(g); nitrogen, N2(g); oxygen O2(g); fluorine, F2(g); chlorine Cl2(g); bromine, Br2(l); and ...
... Write the WORD and SKELETON equations for each chemical reaction. Indicate the state of each reactant and product in the skeleton equation. Remember that the following seven elements are diatomic: hydrogen, H2(g); nitrogen, N2(g); oxygen O2(g); fluorine, F2(g); chlorine Cl2(g); bromine, Br2(l); and ...
Topic 3&4 Atoms and the per.table
... Units 3 and 4 Revision. Q8. Identify the element (a) with an atomic number of 12. (b) with an electron arrangement of 2,5 (c) which has 9 electrons in its atoms. ...
... Units 3 and 4 Revision. Q8. Identify the element (a) with an atomic number of 12. (b) with an electron arrangement of 2,5 (c) which has 9 electrons in its atoms. ...
Chem 1100 Chapter Three Study Guide Outline I. Molar Mass and
... 20. Sodium metal and water react to form hydrogen and sodium hydroxide. If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide, what mass of water was consumed in the reaction? a. 10.66 g b. 4.68 g c. 10.14 g d. 5.98 g 21. What is the chemical formula for str ...
... 20. Sodium metal and water react to form hydrogen and sodium hydroxide. If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide, what mass of water was consumed in the reaction? a. 10.66 g b. 4.68 g c. 10.14 g d. 5.98 g 21. What is the chemical formula for str ...
Oxidation Number Rules
... Examples: N2, Cl2, C, Sn, S8 2. The oxidation number of a simple, monatomic ion is the same as the charge on the ion. Examples: Na+ is +1, Cu+2 is +2, Cu+ is +1, F¯ is -1. 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is -1 in all fluorine containi ...
... Examples: N2, Cl2, C, Sn, S8 2. The oxidation number of a simple, monatomic ion is the same as the charge on the ion. Examples: Na+ is +1, Cu+2 is +2, Cu+ is +1, F¯ is -1. 3. The oxidation numbers of some common atoms are: a. Fluorine, the most electronegative element, is -1 in all fluorine containi ...
Final Exam review semester 1
... 1. Ninety-nine percent of all the matter that can be observed in the universe exists as 2. Hydrochloric acid, HCl, is added to solid NaOH. After the reaction is complete, NaCl dissolved in water remains. What are the products of this chemical reaction? ____ ...
... 1. Ninety-nine percent of all the matter that can be observed in the universe exists as 2. Hydrochloric acid, HCl, is added to solid NaOH. After the reaction is complete, NaCl dissolved in water remains. What are the products of this chemical reaction? ____ ...
Writing Chemical Equations KClO3 O2 (g) + KCl (s) Balancing
... Would read: Solid sodium hydrogen carbonate reacts with aqueous hydrochloric acid to produce aqueous sodium chloride, liquid water and gaseous carbon dioxide. Example2: Oxygen gas can be made by heating potassium chlorate in the presence of the catalyst manganese(IV) oxide. Potassium chloride is lef ...
... Would read: Solid sodium hydrogen carbonate reacts with aqueous hydrochloric acid to produce aqueous sodium chloride, liquid water and gaseous carbon dioxide. Example2: Oxygen gas can be made by heating potassium chlorate in the presence of the catalyst manganese(IV) oxide. Potassium chloride is lef ...
Unit 3 Practice Test
... A. Non-metals generally have the higher electronegativities and tend to attract electrons to themselves in a chemical bond. B. Elements with high ionization energies tend to have small atomic radii. C. Elements with high electronegativities generally form ions with small radii. D. The second ionizat ...
... A. Non-metals generally have the higher electronegativities and tend to attract electrons to themselves in a chemical bond. B. Elements with high ionization energies tend to have small atomic radii. C. Elements with high electronegativities generally form ions with small radii. D. The second ionizat ...
Fluorine
Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.Among the elements, fluorine ranks 24th in universal abundance and 13th in terrestrial abundance. Fluorite, the primary mineral source of fluorine, was first described in 1529; as it was added to metal ores to lower their melting points for smelting, the Latin verb fluo meaning ""flow"" became associated with it. Proposed as an element in 1810, fluorine proved difficult and dangerous to separate from its compounds, and several early experimenters died or sustained injuries from their attempts. Only in 1886 did French chemist Henri Moissan isolate elemental fluorine using low-temperature electrolysis, a process still employed for modern production. Industrial synthesis of fluorine gas for uranium enrichment, its largest application, began during the Manhattan Project in World War II.Owing to the expense of refining pure fluorine, most commercial applications of the element involve the use of its compounds, with about half of mined fluorite used in steelmaking. The rest is converted into corrosive hydrogen fluoride en route to various organic fluorides, or into cryolite which plays a key role in aluminium refining. Organic fluorides have very high chemical and thermal stability; their major uses are as refrigerants, electrical insulation and cookware, the last as PTFE (Teflon). Pharmaceuticals such as atorvastatin and fluoxetine also contain fluorine, and the fluoride ion inhibits dental cavities, and so finds use in toothpaste and water fluoridation. Global fluorochemical sales amount to over US$15 billion a year.Fluorocarbon gases are generally greenhouse gases with global-warming potentials 100 to 20,000 times that of carbon dioxide. Organofluorine compounds persist in the environment due to the strength of the carbon–fluorine bond. Fluorine has no known metabolic role in mammals; a few plants synthesize organofluorine poisons which deter herbivores.