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The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0 percent by mass C, 6.7 percent by mass H, and 53.3 percent by mass O. A solution of 0.523 g of the solid in 28.1 g of the solvent diphenyl °C gave a freezing-point depression of 1.24 °C. Calculate the molar mass and molecular formula of the solid. (K, for diphenyl is 8.00 —.) m

The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0 percent by mass C, 6.7 percent by mass H, and 53.3 percent by mass O. A solution of 0.523 g of the solid in 28.1 g of the solvent diphenyl °C gave a freezing-point depression of 1.24 °C. Calculate the molar mass and molecular formula of the solid. (K, for diphenyl is 8.00 —.) m

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0 percent by mass C, 6.7 percent by mass H, and 53.3 percent by mass O. A solution of 0.523 g of the solid in 28.1 g of the solvent diphenyl ос gave a freezing-point depression of 1.24 °C. Calculate the molar mass and molecular formula of the solid. (K, for diphenyl is 8.00 Part 1 of 2 Be sure your answer has the correct number of significant digits. molar mass: I g mol × Part 2 of 2 molecular formula: × G m
Transcribed Image Text:The elemental analysis of an organic solid extracted from gum arabic (a gummy substance used in adhesives, inks, and pharmaceuticals) showed that it contained 40.0 percent by mass C, 6.7 percent by mass H, and 53.3 percent by mass O. A solution of 0.523 g of the solid in 28.1 g of the solvent diphenyl ос gave a freezing-point depression of 1.24 °C. Calculate the molar mass and molecular formula of the solid. (K, for diphenyl is 8.00 Part 1 of 2 Be sure your answer has the correct number of significant digits. molar mass: I g mol × Part 2 of 2 molecular formula: × G m
The solubility of KNO3 is 155 g per 100.0 g of water at 75 °C and 38.0 g at 25 °C. What mass of KNO3 will crystallize out of solution if exactly 200.0 g of its saturated solution at 75 °C is cooled to 25 °C? Be sure your answer has the correct number of significant digits. g x10
Transcribed Image Text:The solubility of KNO3 is 155 g per 100.0 g of water at 75 °C and 38.0 g at 25 °C. What mass of KNO3 will crystallize out of solution if exactly 200.0 g of its saturated solution at 75 °C is cooled to 25 °C? Be sure your answer has the correct number of significant digits. g x10
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