A sample of metallic element x weighing 3177g

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Fundamentals of Organic Chemistry
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Chapter 2 / Exercise 2.34
Fundamentals of Organic Chemistry
McMurry
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5. A sample of metallic element X, weighing 3.177g combines with 0.6015L of O2gas (at normal pressure and 20.0oC) to form the metal oxide with the formula XO. If the density of Ogas under these conditions is 1.330g/L, what is the mass of the oxygen? The atomic mass of oxygen is 15.9994amu. What is the atomic mass of X? What is the identity of X? 2
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Fundamentals of Organic Chemistry
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Chapter 2 / Exercise 2.34
Fundamentals of Organic Chemistry
McMurry
Expert Verified
6. A sample of green crystals of nickel(II)sulfate heptahydrate was heated carefully to produce the bluish green nickel(II)sulfate hexahydrate. What are the formulas of the hydrated? 8.753g of the heptahydrate produces 8.192g of the hexahydrate, how many grams of anhydrous nickel(II)sulfate could be obtained? If Chapter 4: Chemical Equations and Stoichiometry Topics:Chemical Equations; Balancing Chemical Equations; Mass Relationships in Chemical Reactions: Stoichiometry; Reactions in Which One Reactant is Present in Limited Supply; Percent Yield; Chemical Equations and Chemical Analysis 7. A sample of limestone (containing calcium carbonate) weighing 438mg is treated with a solution of oxalic acid, H2C2O4, to give solid calcium oxalate, CaC2O4, carbon dioxide and water. The mass of the calcium oxalate produced is 472mg. Write a balanced equation for this reaction. What is the mass percentage of calcium carbonate in this limestone? 8. Potassium superoxide, KO2, is employed in a self-contained breathing apparatus used by emergency personnel as a source of oxygen. The reaction is 4KO2(s)+ 2H2O(l)4KOH(s)+ 3O2(g)Say that a self-contained breathing apparatus is charged with 750.g of KO2and then is used to produce 195g of oxygen. Was all of the KO2consumed in this reaction? If the KO2wasn’t all consumed, how much is left over and what mass of additional O2could theoretically be produced? Chapter 5: Reactions in Aqueous Solution Topics:Properties of Compounds in Aqueous Solution; Precipitation Reactions; Acids and Bases; Reactions of Acids and Bases; Gas-Forming Reactions; Classifying Reactions in Aqueous Solution; Oxidation-Reduction Reactions; Measuring Concentrations of Compounds in Solution; pH, a Concentration Scale for Acids and Bases; Stoichiometry of Reactions in Aqueous Solution

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