CHEM 1110- Exam 3 with Latest Questions and Answers
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Course
CHEM 1110
Institution
CHEM 1110
CHEM 1110- Exam 3 with Latest Questions and Answers
Stoichiometry ANSWER The mole ratios among the reactants and products in a chemical equation
Chemical Formula ANSWER A notation for representing the elemental composition of a pure substance using the symbols of the elements and subscripts i...
CHEM 1110- Exam 3 with Latest Questions
and Answers
Stoichiometry ANSWER The mole ratios among the reactants and products in a chemical equation
Chemical Formula ANSWER A notation for representing the elemental composition of a pure substance using the symbols of the elements and subscripts indicate the relative number of atoms of each element in the substance. -shows ratio of elements in a compound
Chemical Equation ANSWER A description of the identities and proportions of the reactants and the products in a chemical reaction
-shorthand notation of chemical reaction
-all substances that react and all products formed
-experimental conditions like heat, light etc (placed over physical state)
-physical state like (g) gas, (aq) aqueous, etc
Formula Unit vs. Molecule ANSWER formula unit is used for ionic bonds, molecules are used for covalent bonds
-Formula Unit: The smallest electrically neutral unit of an ionic compound.
-Molecule: A collection of atoms chemically bonded together.
Reactants and Products ANSWER -Reactants: Substances consumed during a chemical reaction
-Products: Substance formed as a result of a chemical reaction Balancing Chemical Equations ANSWER Making sure that there are equal numbers of each atom on the reactant side and the product side
Subscripts in Molecular Formula ANSWER indicate how many atoms of each element are present
Coefficients in Balanced Equation ANSWER a small whole number that appears in from of a
compound/element in a balanced chemical equation to indicate how many atoms of each element are present
Combination Reactions ANSWER two or more substances react to form one product
Decomposition Reactions ANSWER a reaction in which a single compound breaks down to form two or more simpler substances
Single-replacement Reaction ANSWER a chemical reaction that occurs when the atoms of one element replace the atoms of another element in a compound
Double-replacement Reaction ANSWER a chemical change that involves an exchange of positive ions between two compounds
Combustion Reaction ANSWER a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light
Determining Moles of an Atom Relative to Moles of Compound ANSWER in Al2O3 there are 2 moles of Al for every 1 mole of Al2O3. To get grams you'd do 2 moles/ molecular weight of Al= grams of Al in every mole of Al2O3
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