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Unformatted text preview: LALaput Chemistry 16 Lecture 5 Answer on Assignment: 1.) How many (a) moles of O2(b) O2 molecules(c) O atoms are contained in 40.0 g of oxygen gas at 25°C 2.) Calculate the number of hydrogen atoms in 39.6 g of ammonium sulfate. 3.) Calculate the percent composition of each of the following compounds: (a) nicotine, C 10 H 14 N 2 (b) Vanillin, C 8 H 8 O 3 4.) 5.) BOARD WORK: More than 1 billion pounds of Adipic Acid (MW 146.1 g/mol) is manufactured in the United States each year. Most of it is used to make synthetic fabrics. Adipic Acid contains only C, H and O. Combustion of a 1.6380-g sample of Adipic Acid gives 2.960 g of CO 2 and 1.010 g of H 2 O. (a) What is the simplest formula for adipic acid? (b) what is its molecular formula? 1.Get moles C and moles H. 2. Convert to gram C and H to get moles O. 3. Get moles O. 4. Get mole ratio and Empirical Formula. [C 1.5 H 2.5 N] * 2 = C 3 H 5 N 2 5. Get weight of EF and n....
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