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Iron is found in Earth's crust as seve pounds. Calculate the mass (in kg) c contains 1.0 X 10° kg of iron. (a) Fe,O3 (hematite) (b) Fe;O4 (magnetite) (c) FECO3 (siderite)

Iron is found in Earth's crust as seve pounds. Calculate the mass (in kg) c contains 1.0 X 10° kg of iron. (a) Fe,O3 (hematite) (b) Fe;O4 (magnetite) (c) FECO3 (siderite)

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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#69 a, b and c
**Sample Problems in Chemistry** **67.** How many grams of Cl are in 38.0 g of each sample of chlorofluorocarbons (CFCs)? (a) CF₂Cl₂ (b) CFCl₃ (c) C₂F₃Cl₃ (d) CF₃Cl --- **69.** Iron is found in Earth's crust as several different iron compounds. Calculate the mass (in kg) of each compound that contains 1.0 × 10³ kg of iron. (a) Fe₂O₃ (hematite) (b) Fe₃O₄ (magnetite) (c) FeCO₃ (siderite) --- **MASS PERCENT COMPOSITION** **71.** A 2.45-g sample of strontium completely reacts with oxygen to form 2.89 g of strontium oxide. Use this data to calculate the mass percent composition of strontium in strontium oxide. --- **73.** A 1.912-g sample of calcium chloride is decomposed into its constituent elements and found to contain 0.690 g Ca and 1.222 g Cl. Calculate the mass percent composition of Ca and Cl in calcium chloride. --- **75.** Copper(II) fluoride contains 37.42% F by mass. Use this information to calculate the mass of fluoride in a given sample.
Transcribed Image Text:**Sample Problems in Chemistry** **67.** How many grams of Cl are in 38.0 g of each sample of chlorofluorocarbons (CFCs)? (a) CF₂Cl₂ (b) CFCl₃ (c) C₂F₃Cl₃ (d) CF₃Cl --- **69.** Iron is found in Earth's crust as several different iron compounds. Calculate the mass (in kg) of each compound that contains 1.0 × 10³ kg of iron. (a) Fe₂O₃ (hematite) (b) Fe₃O₄ (magnetite) (c) FeCO₃ (siderite) --- **MASS PERCENT COMPOSITION** **71.** A 2.45-g sample of strontium completely reacts with oxygen to form 2.89 g of strontium oxide. Use this data to calculate the mass percent composition of strontium in strontium oxide. --- **73.** A 1.912-g sample of calcium chloride is decomposed into its constituent elements and found to contain 0.690 g Ca and 1.222 g Cl. Calculate the mass percent composition of Ca and Cl in calcium chloride. --- **75.** Copper(II) fluoride contains 37.42% F by mass. Use this information to calculate the mass of fluoride in a given sample.
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