A. Formula Writing:The use of oxidation numbers is indispensable in writing chemical formulas ofcompounds. After studying the Law of Definite Composition, the chemical behavior ofgroups of elements in the Periodic Table, and the formation of ionic and covalent bonds, youare now ready to write chemical formulas. Remember that the algebraic sum of theoxidation numbers of all the atoms in a molecule is zero.1. Binary CompoundsIndicate the oxidation numbers of each element in a compound before writing itschemical formula.CompoundOxidation NumbersFormulaEx: Sodium chlorideNa+1NaCI1. Lithium oxide2. Potassium lodide3. Magnesium Bromide4. Aluminum sulfide5. Calcium Fluoride

To write the chemical formula of any compund , first write cation which is followed by anion

Answered: Indicate the oxidation numbers of each…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 3.BCP

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The US Environmental Protection Agency (EPA) places limits on the quantities of toxic substances that may be discharged into the sewer system. Limits have been established for a variety of substances, including hexavalent chromium, which is limited to 0.50 mg/L. If an industry is discharging hexavalent chromium as potassium dichromate (K2Cr2O7), what is the maximum permissible molarity of that substance?
When balancing a chemical equation, which of the following statements is false? l type='a'> Subscripts in the reactants must be conserved in the products. i>Coefficients are used to balance the atoms on both sides. i>The law of conservation of matter must he followed. i>Phases are often shown for each compound hut are not critical to balancing an equation.
When steel wool (iron) is heated in pure oxygen gas, the steel wool bursts into flame and a fine powder consisting of a mixture of iron oxides ( FeO and Fe2O3 ) forms. Write separate unbalanced equations for the reaction of iron with oxygen to give each of these products.
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What must be present in an aqueous solution for it to conduct an electric current? What general classes of compounds form solutions that conduct?
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A 2.5624-g sample of a pure solid alkali metal chloride is dissolved in water and treated with excess silver nitrate. The resulting precipitate, filtered and dried, weighs 3.03707 g. What was the percent by mass of chloride ionin the original compound? What is the identity of the salt?
Describe an example of novel reactivity that occurs when using ionic liquids as solvents.
The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the molar concentration of Ca2+ ions in a water samplewith a hardness count of 175 mg CaCO3/L?

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Indicate the oxidation numbers of each element in a compound before writing its chemical formula. Compound Oxidation Numbers Formula Ex: Sodium chloride Na*1 cr' NacI 1. Lithium oxide 2. Potassium lodide 3. Magnesium Bromide 4. Aluminum sulfide 5. Calcium Fluoride