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Extra info for Chemistry Matter and Change Supplemental Problem
22 CHAPTER SUPPLEMENTAL PROBLEMS Hydrocarbons 1. Use the IUPAC rules to name the following alkanes. branched-chain alkane. a. CH3CH2CH2CH2CH3 b. CH3 CH3 c. CH3 CH2CH3 CH3CH2CHCHCHCH2CH3 CH2CH3 d. CH3 CH3CH2 5. Chemists can analyze the composition of hydrocarbons by reacting them with copper oxide. The reaction converts carbon into carbon dioxide and hydrogen into water. Suppose 29 g of a hydrocarbon reacts to produce 88 g of CO2 and 45 g of H2O. CH3CHCHCH3 a. What are the masses of carbon and hydrogen in the hydrocarbon?
What is the empirical formula of the hydrocarbon? c. If the hydrocarbon’s molecular mass is CH2CH3 CH3 CH3 CH2CH3 Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. 4. Calculate the molecular mass of a 22-carbon 2. Draw the structure of each of the following 58 amu, what is its molecular formula? 6. 5. 2. Use these values to decide whether each of the following bonds is polar or nonpolar. alkanes. a. C-C a. 4-propyloctane b. C-H b. 3,4-diethylhexane c. H-H c. 2,2,4,4-tetramethylhexane d.
MassA ϩ MassB ϭ MassAB MassAB ϭ 18 g ϩ 4 g ϭ 22 g Massreactants ϭ Massproducts elements when it is heated. The mass of each component element is listed in the table below. What was the mass of the substance before it was heated? 04 g 3. Silver iodide powder has been used as an anti- septic and as an agent to seed clouds for rain. 9% silver by mass. If you separate a 50-g sample of silver iodide into its elements, silver and iodine, how much silver would you have? From the conservation of mass, the mass of silver recovered is equal to the mass of silver in the initial silver iodide sample.