Exam 2 Review - Iowa State University
... Determining Empirical and Molecular Formulas (3.5) 1. A compound contains only the elements Al and O. Its elemental compositions is determined to be 53.0% aluminum and 47.0% oxygen. The mass of one mole of the compound is 102 g. What is the empirical formula of the compound? What is the molecular fo ...
... Determining Empirical and Molecular Formulas (3.5) 1. A compound contains only the elements Al and O. Its elemental compositions is determined to be 53.0% aluminum and 47.0% oxygen. The mass of one mole of the compound is 102 g. What is the empirical formula of the compound? What is the molecular fo ...
Course Syllabus - Honors Chemistry
... a. Describe chemical reactions by writing balanced equations. b. The quantity one mole is set by defining one mole of carbon 12 atoms to have a mass of exactly 12 grams. c. One mole equals 6.02 10 23 particles (atoms or molecules). d. Determine the molar mass of a molecule from its chemical formula ...
... a. Describe chemical reactions by writing balanced equations. b. The quantity one mole is set by defining one mole of carbon 12 atoms to have a mass of exactly 12 grams. c. One mole equals 6.02 10 23 particles (atoms or molecules). d. Determine the molar mass of a molecule from its chemical formula ...
Chapter 3
... Once again, charges MUST be observed when recombining and formulas are written with cation first. Reaction only happens if one of the two products is Insoluble (s). LEP #14 a, b ...
... Once again, charges MUST be observed when recombining and formulas are written with cation first. Reaction only happens if one of the two products is Insoluble (s). LEP #14 a, b ...
Chapter 4 (additional powerpoint)
... • The amounts of product calculated in the last three examples are not the amounts that would be produced if the reactions were actually done in the laboratory. • In each case, less product would be obtained than was calculated. There are numerous causes. Some materials are lost during transfers fro ...
... • The amounts of product calculated in the last three examples are not the amounts that would be produced if the reactions were actually done in the laboratory. • In each case, less product would be obtained than was calculated. There are numerous causes. Some materials are lost during transfers fro ...
82KB - NZQA
... A: Pb2+(aq) + SO42–(aq) → PbSO4(s) OR Pb(NO3)2(aq) + K2SO4(aq) → PbSO4(s) + 2KNO3(aq) ...
... A: Pb2+(aq) + SO42–(aq) → PbSO4(s) OR Pb(NO3)2(aq) + K2SO4(aq) → PbSO4(s) + 2KNO3(aq) ...
Chemical Reactions
... 1. Fe2O3 + H2 Fe + H 2O Compare the number of each atom in the reactants to the 2. Fe 21 number of the same atom in the 1. O 31 product 2. H 22 Pick one of the unequal atoms 3.Fe2O3 + H2 2Fe and multiply the compound by + H 2O a number so that the atoms are Write the skeleton equation ...
... 1. Fe2O3 + H2 Fe + H 2O Compare the number of each atom in the reactants to the 2. Fe 21 number of the same atom in the 1. O 31 product 2. H 22 Pick one of the unequal atoms 3.Fe2O3 + H2 2Fe and multiply the compound by + H 2O a number so that the atoms are Write the skeleton equation ...
atoms
... that undergo chemical reactions, are called reactants. • Substances formed by chemical reactions, are called products. ...
... that undergo chemical reactions, are called reactants. • Substances formed by chemical reactions, are called products. ...
Chapter 4:Chemical Quantities and Aqueous Reactions:
... acids and weak bases such as HC2H3O2 or NH3 Nonelectrolytes will stay in their formula in an aqueous solution. Nonelectrolytes are the insoluble salts, gases, liquids, and other solids. Writing Molecular, Ionic, and Net ionic equations: Example: For the double displacement reaction of lead (II) nitr ...
... acids and weak bases such as HC2H3O2 or NH3 Nonelectrolytes will stay in their formula in an aqueous solution. Nonelectrolytes are the insoluble salts, gases, liquids, and other solids. Writing Molecular, Ionic, and Net ionic equations: Example: For the double displacement reaction of lead (II) nitr ...
Earth Science - Green Local Schools
... Reactant Double replacement reaction Product Combustion reaction Exothermic reaction Balancing equations Endothermic reaction Coefficient Reaction types Enzyme Synthesis reaction Catalyst Decomposition reaction Law of conservation of mass Single replacement reaction Law of conservation of energy K ...
... Reactant Double replacement reaction Product Combustion reaction Exothermic reaction Balancing equations Endothermic reaction Coefficient Reaction types Enzyme Synthesis reaction Catalyst Decomposition reaction Law of conservation of mass Single replacement reaction Law of conservation of energy K ...
Introduction to Chemical Equations
... • You may NOT change any subscripts in any of the reactant’s or product’s formulas ...
... • You may NOT change any subscripts in any of the reactant’s or product’s formulas ...
Chapter 5 CHEM 121
... • A balanced chemical equation is one in which the number of atoms of each element in the reactants is equal to the number of atoms of that same element in the products. • A reaction can be balanced by applying the law of conservation of matter. • Coefficients (in red below) are written to the left ...
... • A balanced chemical equation is one in which the number of atoms of each element in the reactants is equal to the number of atoms of that same element in the products. • A reaction can be balanced by applying the law of conservation of matter. • Coefficients (in red below) are written to the left ...
Chapter 7 Lecture
... Molecular, Complete Ionic, and Net Ionic Equations A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction. A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. A net ionic e ...
... Molecular, Complete Ionic, and Net Ionic Equations A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction. A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution. A net ionic e ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.