lesson 5
... Not all atoms form compounds. Only atoms that have outer shells that are not full form compounds. The elements of Group 18 have complete outer shells. These atoms usually do not form compounds. All other atoms have outer shells that are not full. All other atoms form compounds. Atoms form compounds ...
... Not all atoms form compounds. Only atoms that have outer shells that are not full form compounds. The elements of Group 18 have complete outer shells. These atoms usually do not form compounds. All other atoms have outer shells that are not full. All other atoms form compounds. Atoms form compounds ...
Ordinary Level - State Examination Commission
... Figure 14 shows the arrangement of the outer electrons in a molecule of ammonia. How many (i) bond pairs, (ii) lone pairs, of electrons are there in the outer shell of the nitrogen atom in an ammonia molecule? The number of bond pairs and lone pairs of electrons in the outer shell of the central ato ...
... Figure 14 shows the arrangement of the outer electrons in a molecule of ammonia. How many (i) bond pairs, (ii) lone pairs, of electrons are there in the outer shell of the nitrogen atom in an ammonia molecule? The number of bond pairs and lone pairs of electrons in the outer shell of the central ato ...
Q1. This question is about the structure of atoms. (a) Choose words
... Complete the sentences below which are about this compound. Phosphorus trifluoride is made up of phosphorus and fluorine ................................ These are joined together by sharing pairs of ............................................... to form ...
... Complete the sentences below which are about this compound. Phosphorus trifluoride is made up of phosphorus and fluorine ................................ These are joined together by sharing pairs of ............................................... to form ...
AP Chemistry Name: Ch.1 – Matter and Measurement Date: Period:
... Sulfur and fluorine form several different compounds including sulfur hexafluoride and sulfur tetrafluoride. Decomposition of a sample of sulfur hexafluoride produces 4.45 g of fluorine and 1.25 g of sulfur, while decomposition of a sample of sulfur tetrafluoride produces 4.43 g of fluorine and 1.87 ...
... Sulfur and fluorine form several different compounds including sulfur hexafluoride and sulfur tetrafluoride. Decomposition of a sample of sulfur hexafluoride produces 4.45 g of fluorine and 1.25 g of sulfur, while decomposition of a sample of sulfur tetrafluoride produces 4.43 g of fluorine and 1.87 ...
Summer Assignment Packet
... Sulfur and fluorine form several different compounds including sulfur hexafluoride and sulfur tetrafluoride. Decomposition of a sample of sulfur hexafluoride produces 4.45 g of fluorine and 1.25 g of sulfur, while decomposition of a sample of sulfur tetrafluoride produces 4.43 g of fluorine and 1.87 ...
... Sulfur and fluorine form several different compounds including sulfur hexafluoride and sulfur tetrafluoride. Decomposition of a sample of sulfur hexafluoride produces 4.45 g of fluorine and 1.25 g of sulfur, while decomposition of a sample of sulfur tetrafluoride produces 4.43 g of fluorine and 1.87 ...
Print out Reviews # 1 through # 17
... EOC REVIEW #13 1. Given the reaction at equilibrium: 2 N2 (g) + O2 (g) 2 N2O (g) (A) What is the equilibrium constant expression (Keq)? (B) What is the value of Keq if [N2] = 5.22 M, [O2] = 2.91 M, and [N2O] = 3.75 M? Use the information given below to answer questions 2 - 4. Given the reaction a ...
... EOC REVIEW #13 1. Given the reaction at equilibrium: 2 N2 (g) + O2 (g) 2 N2O (g) (A) What is the equilibrium constant expression (Keq)? (B) What is the value of Keq if [N2] = 5.22 M, [O2] = 2.91 M, and [N2O] = 3.75 M? Use the information given below to answer questions 2 - 4. Given the reaction a ...
Chapter 8
... designates an aqueous solution, one that is dissolved in water, placed after the formula. 8. __________ indicates that heat is supplied to the reaction 9. __________ a formula written above or below the yield sign indicates it is used as a catalyst. In this case, platinum. G. What is a skeleton equa ...
... designates an aqueous solution, one that is dissolved in water, placed after the formula. 8. __________ indicates that heat is supplied to the reaction 9. __________ a formula written above or below the yield sign indicates it is used as a catalyst. In this case, platinum. G. What is a skeleton equa ...
Chem152
... 1. What is the term for the smallest particle that represents an element? A) atom B) entity C) formula unit D) molecule E) none of the above 2. What is the term for the number that identifies a particular element? A) atomic number B) element number C) mass number D) substance number E) none of the a ...
... 1. What is the term for the smallest particle that represents an element? A) atom B) entity C) formula unit D) molecule E) none of the above 2. What is the term for the number that identifies a particular element? A) atomic number B) element number C) mass number D) substance number E) none of the a ...
chem10chp7spr08
... symbolic terms to represent a chemical reaction. Chemical equations provide us with the means to: - summarize the reaction - display the substances that are reacting (reactants) - show the products - indicate the amounts of all component substances in ...
... symbolic terms to represent a chemical reaction. Chemical equations provide us with the means to: - summarize the reaction - display the substances that are reacting (reactants) - show the products - indicate the amounts of all component substances in ...
nomenclature review
... If 7.40g of calcium hydroxide reacts with excess nitric acid, how many grams of calcium nitrate are formed?(16.4grams) ...
... If 7.40g of calcium hydroxide reacts with excess nitric acid, how many grams of calcium nitrate are formed?(16.4grams) ...
Chemical Reactions
... 24. Two hundred cubic centimeters of a gas are collected by water displacement. The conditions at time are 1.1 atm and 30 oC. The vapor pressure of water at 30 oC is 23.4 mm Hg. What would be the pressure of the dry gas at STP? 25. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O How many milliliters of ethane (C2H6 ...
... 24. Two hundred cubic centimeters of a gas are collected by water displacement. The conditions at time are 1.1 atm and 30 oC. The vapor pressure of water at 30 oC is 23.4 mm Hg. What would be the pressure of the dry gas at STP? 25. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O How many milliliters of ethane (C2H6 ...
Chapter 1
... Homogeneous mixture unless there are undissolved particles such as sand, then heterogeneous c) magnesium Element d) gasoline Homogeneous mixture ...
... Homogeneous mixture unless there are undissolved particles such as sand, then heterogeneous c) magnesium Element d) gasoline Homogeneous mixture ...
Elements (NonMetals)
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
Exercise #5_Chpt 2
... a) What mass of CH4 is needed to exactly combine with 3.4 g Cl2? b) How many grams of Cl2 are required to produce 91 g CCl4, assuming excess CH4? c) What mass of CH4 must have reacted, if 2 mg HCl is liberated? d) Calculate the mass of both CH4 and Cl2 required to produce exactly 0.761 kg CCl4? ...
... a) What mass of CH4 is needed to exactly combine with 3.4 g Cl2? b) How many grams of Cl2 are required to produce 91 g CCl4, assuming excess CH4? c) What mass of CH4 must have reacted, if 2 mg HCl is liberated? d) Calculate the mass of both CH4 and Cl2 required to produce exactly 0.761 kg CCl4? ...
Chemical Reactions
... as a model 3. Balance it Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
... as a model 3. Balance it Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
AP Chemistry Review Assignment Brown and LeMay: Chemistry the
... a) How many moles of HF are needed to react with 0.300 mol of Na2SiO3? b) How many grams of NaF form when 0.500 mol of HF reacts with excess Na2SiO3? c) How many grams of Na2SiO3 can react with 0.800 g of HF? 56. The fermentation of glucose (C6H12O6) produces ethyl alcohol (C2H5OH) and CO2: C6H12O6 ...
... a) How many moles of HF are needed to react with 0.300 mol of Na2SiO3? b) How many grams of NaF form when 0.500 mol of HF reacts with excess Na2SiO3? c) How many grams of Na2SiO3 can react with 0.800 g of HF? 56. The fermentation of glucose (C6H12O6) produces ethyl alcohol (C2H5OH) and CO2: C6H12O6 ...
CHEMISTRY 1710 - Practice Exam #2 (KATZ)
... Section 5 - Follow the directions to solve each problem. 1. An unknown liquid is vaporized in a 273-mL flask by immersion in a water bath at 99°C. The barometric pressure is 753 torr. If the mass of the liquid retained in the flask is 1.362 g, what is its molar mass? a. ...
... Section 5 - Follow the directions to solve each problem. 1. An unknown liquid is vaporized in a 273-mL flask by immersion in a water bath at 99°C. The barometric pressure is 753 torr. If the mass of the liquid retained in the flask is 1.362 g, what is its molar mass? a. ...
Chapter 1: Quiz Review - Wetaskiwin Composite High School
... 10. What property is common to the chemical nicotine (found in cigarettes), caffeine (found in coffee, tea and many soft drinks), and ethanol (found in alcoholic beverages? A. Have no know toxic effects B. Are government regulated C. Are absorbed in such small amounts that they produce no serious p ...
... 10. What property is common to the chemical nicotine (found in cigarettes), caffeine (found in coffee, tea and many soft drinks), and ethanol (found in alcoholic beverages? A. Have no know toxic effects B. Are government regulated C. Are absorbed in such small amounts that they produce no serious p ...
110 REVIEW MATERIALTro 2011
... Metals are those elements which have the characteristic properities of: high luster, good conductors of heat and electricity, and are malleable Nonmetals are those elements, unlike metals do not have a high luster and generally are not good conductors of heat and electricity Transition elements (met ...
... Metals are those elements which have the characteristic properities of: high luster, good conductors of heat and electricity, and are malleable Nonmetals are those elements, unlike metals do not have a high luster and generally are not good conductors of heat and electricity Transition elements (met ...
Chemistry 2008 Multiple Choice
... fraction of CH3OH is closest to which of the following? (A) 0.1 (B) 0.2 (C) 0.3 (D) 0.4 ...
... fraction of CH3OH is closest to which of the following? (A) 0.1 (B) 0.2 (C) 0.3 (D) 0.4 ...
Lab Stuff
... 2. The number of electrons gained or lost can be predicted with an understanding of the octet rule and the number of valence electrons an atom contains. 3. The periodic table is organized by electron configuration, and elements are classified as metals, nonmetals or metalloids based on physical and ...
... 2. The number of electrons gained or lost can be predicted with an understanding of the octet rule and the number of valence electrons an atom contains. 3. The periodic table is organized by electron configuration, and elements are classified as metals, nonmetals or metalloids based on physical and ...
Lab Stuff:
... 2. The number of electrons gained or lost can be predicted with an understanding of the octet rule and the number of valence electrons an atom contains. 3. The periodic table is organized by electron configuration, and elements are classified as metals, nonmetals or metalloids based on physical and ...
... 2. The number of electrons gained or lost can be predicted with an understanding of the octet rule and the number of valence electrons an atom contains. 3. The periodic table is organized by electron configuration, and elements are classified as metals, nonmetals or metalloids based on physical and ...
Fluorochemical industry
The global market for chemicals from fluorine was about US$16 billion per year as of 2006. The industry was predicted to reach 2.6 million metric tons per year by 2015. The largest market is the United States. Western Europe is the second largest. Asia Pacific is the fastest growing region of production. China in particular has experienced significant growth as a fluorochemical market and is becoming a producer of them as well. Fluorite mining (the main source of fluorine) was estimated in 2003 to be a $550 million industry, extracting 4.5 million tons per year.Mined fluorite is separated into two main grades, with about equal production of each. Acidspar is at least 97% CaF2; metspar is much lower purity, 60–85%. (A small amount of the intermediate, ceramic, grade is also made.) Metspar is used almost exclusively for iron smelting. Acidspar is primarily converted to hydrofluoric acid (by reaction with sulfuric acid). The resultant HF is mostly used to produce organofluorides and synthetic cryolite.