Basic Chemistry
6th Edition
ISBN: 9780134878119
Author: Timberlake, Karen C. , William
Publisher: Pearson,
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Chapter 7.6, Problem 56PP
Lactic acid, the substance that builds up in muscles during exercise, has a mass percent composition of 40.0% C, 6.71% H,and 53.3% O, and an experimental molar mass of 90. g. What is the molecular formula of lactic acid?
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Chapter 7 Solutions
Basic Chemistry
Ch. 7.1 - What is a mole?Ch. 7.1 - What is Avogadro’s number?Ch. 7.1 - Calculate each of the following: a. number of C...Ch. 7.1 - Calculate each of the following: a. number of Li...Ch. 7.1 - Calculate each of the following quantities in 2.00...Ch. 7.1 - Calculate each of the following quantities in...Ch. 7.1 - Quinine, C20H24N2O2 , is a component of tonic...Ch. 7.1 - Aluminum sulfate, Al2(SO4)3 , is used in some...Ch. 7.1 - Naproxen is used to treat pain and inflammation...Ch. 7.1 - Benadryl is an over-the-counter drug used to treat...
Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.3 - Calculate the mass, in grams, for each of the...Ch. 7.3 - Calculate the mass, in grams, for each of the...Ch. 7.3 - Calculate the mass, in grams, in 0.150 mol of each...Ch. 7.3 - Calculate the mass, in grams, in 2.28 mol of each...Ch. 7.3 - Calculate the number of moles in each of the...Ch. 7.3 - Calculate the number of moles in each of the...Ch. 7.3 - Calculate the number of moles in 25.0 g of each of...Ch. 7.3 - Calculate the number of moles in 4.00 g of each of...Ch. 7.3 - Calculate the mass, in grams, of C in each of the...Ch. 7.3 - Calculate the mass, in grams, of N in each of the...Ch. 7.3 - Propane gas, C3H8 , is used as a fuel for many...Ch. 7.3 - Allyl sulfide, (C3H5)2S , gives garlic, onions,...Ch. 7.3 - a. The compound MgSO4 , Epsom salts, is used to...Ch. 7.3 - Prob. 34PPCh. 7.3 - Prob. 35PPCh. 7.3 - Prob. 36PPCh. 7.4 - Calculate the mass percent composition of each of...Ch. 7.4 - Calculate the mass percent composition of each of...Ch. 7.4 - Prob. 39PPCh. 7.4 - Prob. 40PPCh. 7.4 - Prob. 41PPCh. 7.4 - Calculate the mass percent of S in each of the...Ch. 7.5 - Calculate the empirical formula for each of the...Ch. 7.5 - Calculate the empirical formula for each of the...Ch. 7.5 - Calculate the empirical formula for each of the...Ch. 7.5 - Calculate the empirical formula for each of the...Ch. 7.6 - Write the empirical formula for each of the...Ch. 7.6 - Prob. 48PPCh. 7.6 - The carbohydrate fructose found in honey and...Ch. 7.6 - Caffeine has an empirical formula of C4H5N2O . If...Ch. 7.6 - Prob. 51PPCh. 7.6 - Glyoxal, used in textiles; maleic acid, used to...Ch. 7.6 - Prob. 53PPCh. 7.6 - Prob. 54PPCh. 7.6 - Vanillic acid contains 57.14% C, 4.80% H, and...Ch. 7.6 - Lactic acid, the substance that builds up in...Ch. 7.6 - A sample of nicotine, a poisonous compound found...Ch. 7.6 - Adenine, a nitrogen-containing compound found in...Ch. 7.6 - Clavulanic acid has a molecular formula of C8H9NO5...Ch. 7.6 - Phenylpropanolamine (PPA) is used to treat urinary...Ch. 7 - The chapter sections to review are shown in...Ch. 7 - The chapter sections to review are shown in...Ch. 7 - The chapter sections to review are shown in...Ch. 7 - Prob. 64UTCCh. 7 - Prob. 65APPCh. 7 - Calculate the mass, in grams, of Cu in each of the...Ch. 7 - Prob. 67APPCh. 7 - Calculate the mass percent composition for each of...Ch. 7 - Prob. 69APPCh. 7 - Prob. 70APPCh. 7 - A mixture contains 0.250 mol of Mn2O3 and 20.0 g...Ch. 7 - A mixture contains 4.001023 molecules of PCl3 and...Ch. 7 - Prob. 73APPCh. 7 - Prob. 74APPCh. 7 - Prob. 75APPCh. 7 - Prob. 76APPCh. 7 - Prob. 77APPCh. 7 - Prob. 78APPCh. 7 - Calculate the molar mass for each of the...Ch. 7 - Calculate the molar mass for each of the...Ch. 7 - Aspirin, C9H8O4 , is used to reduce inflammation...Ch. 7 - Ammonium sulfate, (NH4)2SO4 , is used in...Ch. 7 - Prob. 83APPCh. 7 - Prob. 84APPCh. 7 - Oleic acid, a component of olive oil, is 76.54% C,...Ch. 7 - Prob. 86APPCh. 7 - Prob. 87CPCh. 7 - Prob. 88CPCh. 7 - Prob. 89CPCh. 7 - The following problems are related to the topics...Ch. 7 - For parts a to f, consider the loss of electrons...Ch. 7 - A sterling silver bracelet, which is 92.5% silver...Ch. 7 - Prob. 9CICh. 7 - The active ingredient in an antacid tablet is...Ch. 7 - Oseltamivir, C16H28N2O4 , is a drug that is used...Ch. 7 - Prob. 12CI
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- 3.98 The characteristic odor of decaying flesh is due to the presence of various nitrogen-containing compounds. One such compound, called putrescine, was analyzed and found to contain 54.49% carbon, 13.72% hydrogen, and 31.78% nitrogen by mass. If the molar mass of putrescine is known to be between 85 and 105, what is its molecular formula?arrow_forwardThe active ingredient in Pepto-Bismo® (an over- the-counter remedy for an upset stomach) is bismuth sub-salicylate, C7H5BiO4. Analysis of a 1.7500-g sample of Pepto-Bismol yields 346 mg of bismuth. What percent by mass is bismuth subsalicylate in the sample? (Assume that there are no other bismuth-containing compounds in Pepto-Bismol.)arrow_forwardPhosphorus oxychloride is the starting compound for preparing substances used as flame retardants for plastics. An 8.53-mg sample of phosphorus oxychloride contains 1.72 mg of phosphorus. What is the mass percentage of phosphorus in the compound?arrow_forward
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- The reaction of methane and water is one way to prepare hydrogen for use as a fuel: CH4(g) + H2O(g) CO(g) + 3 H2(g) If you begin with 995 g of CH4 and 2510 g of water, (a) Which reactant is the limiting reactant? (b) What is the maximum mass of H2 that can be prepared? (c) What mass of the excess reactant remains when the reaction is completed?arrow_forwardWhich molecule has a molecular mass of 28.05 amu?arrow_forwardNitrogen fixation in the root nodules of peas and other legumes occurs with a reaction involving a molybdenum-containing enzyme named nitrogenase. This enzyme contains two Mo atoms per molecule and is 0.0872% Mo by mass. Calculate the molar mass of the enzyme.arrow_forward
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