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79: Calculate the mass percent composition of nitrogen in each compound N20, NO, NO2, N;O5

79: Calculate the mass percent composition of nitrogen in each compound N20, NO, NO2, N;O5

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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Question 79.

12:51 1 Search < Вack hw6.pdf 19: How many atoms are in each 3.4 mol Cu, 9.7*103 mol C, 22.9 mol Hg, 0.215 mol Na 25: How many moles of tin atoms are in a pure tin cup with a mass of 38.1 g? 27: A pure gold coin contains 0.145 mol of gold. What is its mass? 33: A pure silver ring contains 0.0134 mmol (milimol) Ag. How many silver atoms does it contain? 39: How many carbon atoms are in a diamond (pure carbon) with a mass of 38 mg? 41: How many titanium atoms are in a pure titanium bicycle frame with a mass of 1.28 kg? 47: Determine the number of moles of molecules (or formula units) in each sample. 38.2 g sodium chloride, 36.5 g nitrogen monoxide, 4.25 kg carbon dioxide, 2.71 mg carbon tetrachloride 51: A mothball, composed of naphthalene (C10H8), has a mass of 1.32 g. How many naphthalene molecules does it contain? 55: A sugar crystal contains approximately 1.8*1017 sucrose (C12H22011) molecules. What is its mass in milligrams? 59: Determine the number of moles of CI in 2.7 mol CaCI, 67: How many grams of Cl are in 38.0 g of each sample of chlorofluorocarbons (CFCS)? CF2C12, CFCI3, C2F3C]3, CF3CI 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. 79: Calculate the mass percent composition of nitrogen in each compound N20, NO, NO2, N2O5 87: A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 g of nitrogen and 4.05 g of oxygen. Calculate the empirical formula of the compound 91: The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound called putrescine. Elemental analysis of putrescine indicates that it consists of 54.50% C, 13.73% H, and 31.77% N. Calculate the empirical formula of putrescine. (Hint: Begin by assuming a 100-g sample and determining the mass of each element in that 100-g sample.) 95: A 1.45-g sample of phosphorous burns in air and forms 2.57 g of a phosphorous oxide. Calculate the empirical formula of the oxide. (Hint: Determine the mass of oxygen in the 2.57 g of phosphorous oxide by determining the difference in mass before and after the phosphorous burns in air.) 93: These compounds are found in many natural flavors and scents. Calculate the empirical formula for each compound « Previous Next > 15 000 Dashboard Calendar Тo Do Notifications Inbox
Transcribed Image Text:12:51 1 Search < Вack hw6.pdf 19: How many atoms are in each 3.4 mol Cu, 9.7*103 mol C, 22.9 mol Hg, 0.215 mol Na 25: How many moles of tin atoms are in a pure tin cup with a mass of 38.1 g? 27: A pure gold coin contains 0.145 mol of gold. What is its mass? 33: A pure silver ring contains 0.0134 mmol (milimol) Ag. How many silver atoms does it contain? 39: How many carbon atoms are in a diamond (pure carbon) with a mass of 38 mg? 41: How many titanium atoms are in a pure titanium bicycle frame with a mass of 1.28 kg? 47: Determine the number of moles of molecules (or formula units) in each sample. 38.2 g sodium chloride, 36.5 g nitrogen monoxide, 4.25 kg carbon dioxide, 2.71 mg carbon tetrachloride 51: A mothball, composed of naphthalene (C10H8), has a mass of 1.32 g. How many naphthalene molecules does it contain? 55: A sugar crystal contains approximately 1.8*1017 sucrose (C12H22011) molecules. What is its mass in milligrams? 59: Determine the number of moles of CI in 2.7 mol CaCI, 67: How many grams of Cl are in 38.0 g of each sample of chlorofluorocarbons (CFCS)? CF2C12, CFCI3, C2F3C]3, CF3CI 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. 79: Calculate the mass percent composition of nitrogen in each compound N20, NO, NO2, N2O5 87: A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 g of nitrogen and 4.05 g of oxygen. Calculate the empirical formula of the compound 91: The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound called putrescine. Elemental analysis of putrescine indicates that it consists of 54.50% C, 13.73% H, and 31.77% N. Calculate the empirical formula of putrescine. (Hint: Begin by assuming a 100-g sample and determining the mass of each element in that 100-g sample.) 95: A 1.45-g sample of phosphorous burns in air and forms 2.57 g of a phosphorous oxide. Calculate the empirical formula of the oxide. (Hint: Determine the mass of oxygen in the 2.57 g of phosphorous oxide by determining the difference in mass before and after the phosphorous burns in air.) 93: These compounds are found in many natural flavors and scents. Calculate the empirical formula for each compound « Previous Next > 15 000 Dashboard Calendar Тo Do Notifications Inbox
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