Chemical reactions and equations
... DON’T CHANGE SUBSCRIPTS!!!! (changing the subscript changes what the reactant or product is!) ...
... DON’T CHANGE SUBSCRIPTS!!!! (changing the subscript changes what the reactant or product is!) ...
South Pasadena • AP Chemistry
... a) all salts containing NH4+ are soluble. b) all salts containing NO3– are soluble. c) all fluorides are soluble. d) all sulfates (except those of Ca2+, Sr2+, Ba2+, and Pb2+) are soluble. e) most hydroxides are insoluble, except those of Ca2+, Sr2+, Ba2+, the alkali metals and NH4+. ...
... a) all salts containing NH4+ are soluble. b) all salts containing NO3– are soluble. c) all fluorides are soluble. d) all sulfates (except those of Ca2+, Sr2+, Ba2+, and Pb2+) are soluble. e) most hydroxides are insoluble, except those of Ca2+, Sr2+, Ba2+, the alkali metals and NH4+. ...
File
... A. It is an average of the number of neutrons in the atoms of an element. B. It is an average of the masses of the naturally occurring isotopes. C. It is an average of the atomic numbers of the naturally occurring isotopes. D. None of the above. 9. Which element has the greatest atomic number? A. Ni ...
... A. It is an average of the number of neutrons in the atoms of an element. B. It is an average of the masses of the naturally occurring isotopes. C. It is an average of the atomic numbers of the naturally occurring isotopes. D. None of the above. 9. Which element has the greatest atomic number? A. Ni ...
Electrochemical Investigations of W(CO) (L) and W(CO) (L) Complexes:
... moeity, such as Re(CO)3(LL), where LL = a polypyridyl ligand such as 2,2’-bipyridine (bpy), 1,10phenanthroline or related ligands, would be bridged to a non-emissive second metal center, W(CO)5 in this example, that undergoes reversible redox processes. Such compounds could potentially have “redox-t ...
... moeity, such as Re(CO)3(LL), where LL = a polypyridyl ligand such as 2,2’-bipyridine (bpy), 1,10phenanthroline or related ligands, would be bridged to a non-emissive second metal center, W(CO)5 in this example, that undergoes reversible redox processes. Such compounds could potentially have “redox-t ...
Atomic Theories and Models - MrD-Home
... The chemical equation for the reaction of methane and oxygen is ______ yet properly balanced because the atoms of the elements on the product side do not ______ the atoms of each element on the reactant side of the equation. The _________________________, which states that matter can neither be ____ ...
... The chemical equation for the reaction of methane and oxygen is ______ yet properly balanced because the atoms of the elements on the product side do not ______ the atoms of each element on the reactant side of the equation. The _________________________, which states that matter can neither be ____ ...
Type of Chemical Reactions Lab
... Complete the following for each of the reactions you observed… 1. Identify the type of reaction taking place. 2. Use the reaction type to predict the products of the chemical reaction. 3. Write the balanced chemical equation for each reaction. a) Start by writing the formulas for each of the chemica ...
... Complete the following for each of the reactions you observed… 1. Identify the type of reaction taking place. 2. Use the reaction type to predict the products of the chemical reaction. 3. Write the balanced chemical equation for each reaction. a) Start by writing the formulas for each of the chemica ...
Prerequisite Knowledge for Chemistry
... Atomic Mass is the “weight” of an atom. Atomic mass is also most often included in periodic tables, but does not have to be a whole number. ...
... Atomic Mass is the “weight” of an atom. Atomic mass is also most often included in periodic tables, but does not have to be a whole number. ...
Chemistry exam review
... 3. An open container of water is brought to a boil and heated until all of the water is converted to water vapor. Which describes the changes in the water molecules? a. The molecules speed up and move farther apart. b. The molecules speed up and move closer together. c. The molecules slow down and m ...
... 3. An open container of water is brought to a boil and heated until all of the water is converted to water vapor. Which describes the changes in the water molecules? a. The molecules speed up and move farther apart. b. The molecules speed up and move closer together. c. The molecules slow down and m ...
Semester 2 Review WS
... b.) When hydrochloric acid is added to sodium bicarbonate, it produces water, sodium chloride and carbon dioxide. If 20.0 grams of sodium bicarbonate reacts and 6.75 g of CO2 is produced, what is the percent yield of the carbon dioxide? ...
... b.) When hydrochloric acid is added to sodium bicarbonate, it produces water, sodium chloride and carbon dioxide. If 20.0 grams of sodium bicarbonate reacts and 6.75 g of CO2 is produced, what is the percent yield of the carbon dioxide? ...
CHEMICAL EQUATIONS, SYMBOLS, FORULAS 7
... The total mass of the material(s) before the reaction is the same as the total mass of material(s) after the reaction. A balanced chemical equation has the same number of each kind of atom on the reactant side as on the ...
... The total mass of the material(s) before the reaction is the same as the total mass of material(s) after the reaction. A balanced chemical equation has the same number of each kind of atom on the reactant side as on the ...
2 - Castle High School
... • An atom of an element with atomic number 48 and mass number 120 contains • a. 48 protons, 48 electrons, and 72 neutrons. • b. 72 protons, 48 electrons, and 48 neutrons. • c. 120 protons, 48 electrons, and 72 neutrons. • d. 72 protons, 72 electrons, and 48 neutrons. ...
... • An atom of an element with atomic number 48 and mass number 120 contains • a. 48 protons, 48 electrons, and 72 neutrons. • b. 72 protons, 48 electrons, and 48 neutrons. • c. 120 protons, 48 electrons, and 72 neutrons. • d. 72 protons, 72 electrons, and 48 neutrons. ...
Chemistry FINAL: CONTENT Review Packet
... _______________________is made from two or more substances that are physically combined The ability to do work is known as ________________ ________________________ are substances that are made up of only one type of atom ____________________________ is anything that has both mass and volume _______ ...
... _______________________is made from two or more substances that are physically combined The ability to do work is known as ________________ ________________________ are substances that are made up of only one type of atom ____________________________ is anything that has both mass and volume _______ ...
Writing Chemical Equations KClO3 O2 (g) + KCl (s) Balancing
... Example: NaHCO3 (s) + HCl (aq) NaCl (aq) + H2O (l) + CO2 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 o ...
... Example: NaHCO3 (s) + HCl (aq) NaCl (aq) + H2O (l) + CO2 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 o ...
Balanced Chemical Reaction Equations
... Dr. Dave: Yes, you three figured that out. The number of atoms of each element must be the same on both sides of the equation because atoms are not created or destroyed in a chemical reaction, just regrouped to form different molecules. That’s the key point! Let me say that a bit louder — That’s th ...
... Dr. Dave: Yes, you three figured that out. The number of atoms of each element must be the same on both sides of the equation because atoms are not created or destroyed in a chemical reaction, just regrouped to form different molecules. That’s the key point! Let me say that a bit louder — That’s th ...
What is a mixture?
... Pure Substances • Pure substances are substances in which there is only one type of particle. • These particles are called atoms. • The only two things that are pure substances are: 1. Elements 2. Compounds ...
... Pure Substances • Pure substances are substances in which there is only one type of particle. • These particles are called atoms. • The only two things that are pure substances are: 1. Elements 2. Compounds ...
CHAPTER 8: ENERGY FROM ELECTRON TRANSFER
... c. Lead is being oxidized, so lead is the anode. Lead dioxide is being reduced, so it is the cathode. 13. What is meant by the term hybrid car? Answer: In current usage, the term hybrid car refers to the combination of a gasoline engine with a nickel-metal hydride battery, an electric motor, and an ...
... c. Lead is being oxidized, so lead is the anode. Lead dioxide is being reduced, so it is the cathode. 13. What is meant by the term hybrid car? Answer: In current usage, the term hybrid car refers to the combination of a gasoline engine with a nickel-metal hydride battery, an electric motor, and an ...
Exam Review - hrsbstaff.ednet.ns.ca
... d) names 20. The period number in the periodic table designates the __ for the row. a) total nuclear charge c) maximum number of outer electrons b) maximum number of nucleons d) highest energy level 21. The radii of the atoms become smaller from sodium to chlorine across period 3. This is primarily ...
... d) names 20. The period number in the periodic table designates the __ for the row. a) total nuclear charge c) maximum number of outer electrons b) maximum number of nucleons d) highest energy level 21. The radii of the atoms become smaller from sodium to chlorine across period 3. This is primarily ...
Chapter 1: Quiz Review - Wetaskiwin Composite High School
... B. There are more positive charge C. There is more negative charge D. The charge depends upon the compound 2. What is unusual about pure substance whose formulas begin with hydrogen such as HBr (hydrogen bromide)? A. They are ionic, but their names contain prefixes B. They are molecular, but their n ...
... B. There are more positive charge C. There is more negative charge D. The charge depends upon the compound 2. What is unusual about pure substance whose formulas begin with hydrogen such as HBr (hydrogen bromide)? A. They are ionic, but their names contain prefixes B. They are molecular, but their n ...
Final Exam Review Answers
... • An atom of an element with atomic number 48 and mass number 120 contains • a. 48 protons, 48 electrons, and 72 neutrons. • b. 72 protons, 48 electrons, and 48 neutrons. • c. 120 protons, 48 electrons, and 72 neutrons. • d. 72 protons, 72 electrons, and 48 neutrons. ...
... • An atom of an element with atomic number 48 and mass number 120 contains • a. 48 protons, 48 electrons, and 72 neutrons. • b. 72 protons, 48 electrons, and 48 neutrons. • c. 120 protons, 48 electrons, and 72 neutrons. • d. 72 protons, 72 electrons, and 48 neutrons. ...
Midterm 1 2009 (PDF format)
... An organic compound was found to contain only C, H, and Cl. When a 1.50 g sample of the compound was completely combusted in air, 3.52 g of CO2 was formed. In a separate experiment the chlorine in a 1.00 g sample of the compound was converted to 1.27 g of AgCl. Determine the empirical formula of the ...
... An organic compound was found to contain only C, H, and Cl. When a 1.50 g sample of the compound was completely combusted in air, 3.52 g of CO2 was formed. In a separate experiment the chlorine in a 1.00 g sample of the compound was converted to 1.27 g of AgCl. Determine the empirical formula of the ...
Chemistry exam review
... 3. An open container of water is brought to a boil and heated until all of the water is converted to water vapor. Which describes the changes in the water molecules? a. The molecules speed up and move farther apart. b. The molecules speed up and move closer together. c. The molecules slow down and m ...
... 3. An open container of water is brought to a boil and heated until all of the water is converted to water vapor. Which describes the changes in the water molecules? a. The molecules speed up and move farther apart. b. The molecules speed up and move closer together. c. The molecules slow down and m ...
Chemistry exam review
... 2. The gases helium, neon, and argon are in separate containers at 55°C. Which is true about the kinetic energy of the gases? a. Helium has the lowest mass and therefore the greatest kinetic energy. b. They each have a different kinetic energy. c. Argon has greatest mass and therefore the greatest ...
... 2. The gases helium, neon, and argon are in separate containers at 55°C. Which is true about the kinetic energy of the gases? a. Helium has the lowest mass and therefore the greatest kinetic energy. b. They each have a different kinetic energy. c. Argon has greatest mass and therefore the greatest ...
PART 2 – CHEMISTRY
... Let's look at why and how elements combine to form the molecules of every substance around us. If there are 2 electrons in a single shell surrounding the nucleus or 8 electrons in the outermost shell in the case where the atom has more than one shell, then the atom is said to be stable. This means t ...
... Let's look at why and how elements combine to form the molecules of every substance around us. If there are 2 electrons in a single shell surrounding the nucleus or 8 electrons in the outermost shell in the case where the atom has more than one shell, then the atom is said to be stable. This means t ...
Atom (A) or Ion
... 19. This substance is an ion. 20. This substance is an isotope of carbon-12 (12C) 21. The Atomic Theory was first stated in the late 1700s. Which of the following is NOT part of this Atomic Theory? A) All elements are composed of tiny indivisible particles called atoms. B) Atoms are made of smaller ...
... 19. This substance is an ion. 20. This substance is an isotope of carbon-12 (12C) 21. The Atomic Theory was first stated in the late 1700s. Which of the following is NOT part of this Atomic Theory? A) All elements are composed of tiny indivisible particles called atoms. B) Atoms are made of smaller ...
Chapter 4: Aqueous Reactions and Solution
... reactions and our abilities to predict the products of and write balanced chemical equations for a variety of chemical reactions. We will also review solution terminology, properties of solutions and the concept of molarity. We will then be able extend our ability to do stoichiometric calculations t ...
... reactions and our abilities to predict the products of and write balanced chemical equations for a variety of chemical reactions. We will also review solution terminology, properties of solutions and the concept of molarity. We will then be able extend our ability to do stoichiometric calculations t ...
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.