Chemistry:central Sci.-masteringchem.
14th Edition
ISBN: 9780134294162
Author: Brown
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 44E
At least 25 μg oftetrahydrocannabinol (THC), the active ingredient m marijuana, IS required to produce intoxication- The molecular formula of THC is C21H30O2. How many moles of THC does this 25 μg represent? How many molecules?
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Chapter 3 Solutions
Chemistry:central Sci.-masteringchem.
Ch. 3.1 - In the following diagram, the white spheres...Ch. 3.1 - In the following digram, the white spheres...Ch. 3.1 - The unbalanced equation for the reaction between...Ch. 3.1 - Balance these equations by providing the missing...Ch. 3.2 - Which of the following reactions is the balanced...Ch. 3.2 - Write a balanced equation for (a) solid...Ch. 3.2 - Write the balanced equation for the reaction that...Ch. 3.2 - Prob. 3.4.2PECh. 3.3 - Which of the following is the correct formula...Ch. 3.3 - Prob. 3.5.2PE
Ch. 3.3 - What is the percentage of nitrogen, by mass, in...Ch. 3.3 - Calculate the percentage of potassium by mass in...Ch. 3.4 - Which of the following samples contains the fewest...Ch. 3.4 - Without using a calculator, arrange these samples...Ch. 3.4 -
How many sulfur are in (a) 0.45 mol BaSo4 and (b)...Ch. 3.4 -
How many oxygen atoms are in (a) 0.25 mol...Ch. 3.4 - A sample of an ionic compound containing iron and...Ch. 3.4 - Calculate the molar mass of Ca(NO3)2Ch. 3.4 - A 508-g sample of sodium bicarbonate (NaHCO3)...Ch. 3.4 - Prob. 3.10.2PECh. 3.4 - What is the mass, in grams, of 6.33 mol of NaHC03...Ch. 3.4 - What is the mass, in grams, of (a) 0.50 mol of...Ch. 3.4 - How many chlorine atoms are in 12.2 g of CCL4? a....Ch. 3.4 -
a. How many nitric acid molecules are in 4.20 g...Ch. 3.5 - A 2.144-g sample of phosgene, a compound used as a...Ch. 3.5 - A 5.325-g sample of methyl benzoate, a compound...Ch. 3.5 -
Cyclohexane a commonly used organic solvent, is...Ch. 3.5 - Prob. 3.14.2PECh. 3.5 -
The compound dioxane, which is used as a solvent...Ch. 3.5 -
a. Caproic acid, responsible for the odor of...Ch. 3.6 - Sodium hydroxide reacts with carbon dioxide to...Ch. 3.6 - Decomposition of KCIO3 is sometimes used to...Ch. 3.6 - Propane, C3 H8 (Figure 3.8), is a common fuel used...Ch. 3.6 -
Methanol, CH3OH, reacts with oxygen from air in a...Ch. 3.7 - When 24 mol of methanol and 15 mol of oxygen...Ch. 3.7 - a. When 1.50 mol of Al and 3.00 mol of Cl2 combine...Ch. 3.7 - Molten gallium reacts with arsenic to form the...Ch. 3.7 -
When a 2.00-g strip of zinc metal is placed in...Ch. 3.7 - If 3.00 g of titanium metal is reacted with 6.00 g...Ch. 3.7 - Imagine you are working on ways to improve the...Ch. 3 - The reaction between reactant A (blue spheres) and...Ch. 3 - The following diagram shows the combination...Ch. 3 -
3.3 The following diagram represents the...Ch. 3 -
3.4 The following diagram represents the...Ch. 3 - Glycine, an amino acid used by organisms to make...Ch. 3 - The following diagram represents a...Ch. 3 -
3.7 Nitrogen (N2) and hydrogen (H2) react to form...Ch. 3 -
3.8 Nitrogen monoxide and oxygen react to form...Ch. 3 - Write "true" or "false" for each statement. a. We...Ch. 3 - A key step in balancing chemical equations is...Ch. 3 - Balance the following equations: a. CO(g)...Ch. 3 - Balance the following equations 3. Li(s) + N2(g)...Ch. 3 -
3.13 Balance the following equations:
A14C3(s) +...Ch. 3 -
3.14 Balance the following equations:
a. Ca3P2(s)...Ch. 3 -
3.15 Write balanced chemical equations...Ch. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 -
318
a. When a compound containing C, H, and O is...Ch. 3 - Write a balanced chemical equation for the...Ch. 3 -
3.20 Write a balanced chemical equation for the...Ch. 3 - Balance the following equations and indicate...Ch. 3 - Balance the following equations and indicate...Ch. 3 - Determine the formula weights of each of the...Ch. 3 - 3.24 Determine the formula weights of each of the...Ch. 3 - Calculate the percentage by mass of oxygen in the...Ch. 3 - Calculate the percentage by mass of the indicated...Ch. 3 - Based on the following structural formulas,...Ch. 3 - Calculate the percentage of carbon by mass In each...Ch. 3 - Write "true' or 'Yalse' for each statement a- A...Ch. 3 - a. What is the mass, in grams, of one mole of 12C?...Ch. 3 - Without doing any detailed calculations (but using...Ch. 3 - Without doing any detailed calculations {but using...Ch. 3 - What is the mass, m Iqlograms, of an Avogadro“s...Ch. 3 - If Avogadro’s number of pennies is divided equally...Ch. 3 - Calculate the following quantities: a. mass, in...Ch. 3 - Calculate the following quantities: a. mass, in...Ch. 3 - a. What is the mass, in grams, of 2.50 x 10-3 mol...Ch. 3 - a. What is the mass, in grams, of 1.223 mol of...Ch. 3 -
339 The molecular formula of allicin, the...Ch. 3 -
3.40 The molecular formula of aspartame, the...Ch. 3 -
3.41 A sample of glucose, C6H12O6, contains 1.250...Ch. 3 - A sample of the male sex hormone testosterone,...Ch. 3 -
343 The allowable concentration level of vinyl...Ch. 3 - At least 25 g oftetrahydrocannabinol (THC), the...Ch. 3 - Give the empirical formula of each of the...Ch. 3 - Determine the empirical formula of each of the...Ch. 3 - Determine the empirical formulas of the compounds...Ch. 3 - Determine the empirical formulas of the compounds...Ch. 3 -
3.49 A compound whose empirical formula is XF3...Ch. 3 - The compound XCL4contains 75.0% CI by mass What is...Ch. 3 -
3.51 What is the molecular formula of each of the...Ch. 3 - What is the molecular formula of each of the...Ch. 3 - Determine the empirical and molecular formulas of...Ch. 3 - Determine the empirical and molecular formulas of...Ch. 3 - a. Combustion analysis of toluene, a common...Ch. 3 - a. The characteristic odor of pineapple is due to...Ch. 3 -
3.57 Valproic acid, used to treat seizures and...Ch. 3 - Propenoic acid, C3H4O2, is a reactive organic...Ch. 3 -
3.59 Washing soda, a compound used to prepare...Ch. 3 -
3.60 Epsom salts, a strong laxative used in...Ch. 3 - f 3461 Hydrofluoric acid, HF(aq), cannot be stored...Ch. 3 - The reaction between potassium superoxide, KO2,...Ch. 3 -
3,63 Several brands of antacids use Al(OH)3 to...Ch. 3 -
3.64 An iron ore sample contains Fe2O3 together...Ch. 3 - Aluminum sulfides reacts with water to form...Ch. 3 - Calcium hydride reacts with water to form calcium...Ch. 3 -
3.67 Automotive air bags infilate when sodium...Ch. 3 - The complete combustion of octane, Cngs, a...Ch. 3 -
3.69 A piece of aluminum foil 1.00 cm2 and...Ch. 3 - Detonation of nitroglycerin proceeds as follows:...Ch. 3 -
3.71 The combustion of one mole of liquid...Ch. 3 - The combustion of one mole of liquid octane,...Ch. 3 - a. Define the terms limiting reactant and excess...Ch. 3 - Define the terms theoretical yield, actual yield,...Ch. 3 -
3-75 Consider the mixture of ethanol, C2H5OH, and...Ch. 3 - Consider the mixture of propane, C3H8, and O2...Ch. 3 -
3-77 Sodium hydroxide reacts with carbon doxidc...Ch. 3 -
3.78 Aluminum hydroxide reacts with sulfuric acid...Ch. 3 - The fizz produced when an Alka-Seltzer tablet is...Ch. 3 - One of the steps in the commercial procas for...Ch. 3 - Solutions of sodium carbonate and silver nitrate...Ch. 3 - Solutions of sulfuric acid and Iead (ll) acetate...Ch. 3 - When benzene (C6H6) reacts with bromine (Br2),...Ch. 3 - When ethane (C6H6) reacts with chlorine (Cl2), the...Ch. 3 -
3.85 Hydrogen sulfide is an impurity in natural...Ch. 3 -
386 When hydrogen sulfide gas is bubbled into a...Ch. 3 -
387 Write the balanced chemical equations for
a....Ch. 3 - If 1.5 mol C2H5OH, 1.5 mol C3H8, and 1.5 mol...Ch. 3 -
3.89 The effectiveness of nitrogen fertilizers...Ch. 3 -
3.90
a. The molecular formula of acetylsalicylic...Ch. 3 - Very small semiconductor crystals, composed of...Ch. 3 - a. One molecule of the antibiotic penicillin G has...Ch. 3 - Serotonin is a compound that conducts nerve...Ch. 3 -
3.94 The koala dines exclusively on eucalyptus...Ch. 3 -
3.95 Vanillin, the dominant flavoring in vanilla,...Ch. 3 -
3.96 An organic compound was found to contain...Ch. 3 -
3.97 A compound, KBrO,, where x is unknown, is...Ch. 3 - 398 An element X forms an iodide (X13) and a...Ch. 3 - A method used by the U.S. Environmental Protection...Ch. 3 -
3.100 A chemical plant uses electrical energy to...Ch. 3 - The fat stored in a camel’s hump is a source of...Ch. 3 -
3.102 When hydrocarbons are burned in a limited...Ch. 3 -
3.103 A mixture of N2(g) and H2(g) reacts in a...Ch. 3 -
3.104 A mixture containing KClO3, K2CO3, KHCO3,...Ch. 3 - When a mixture of 10.0 g of acetylene (C2H2) and...Ch. 3 -
3.106 The semiconductor gallium arsenide, GaAs,...Ch. 3 -
3.107 Paclitaxel, C47H51NO14, is an anticancer...Ch. 3 -
3.108 Consider a sample of calcium carbonate in...Ch. 3 -
3.109
a. You are given a cube of silver metal...Ch. 3 -
3.110
a. If an automobile travels 225 mi with a...Ch. 3 - Prob. 111IECh. 3 -
3.112 A particular coal contains 2.596 sulfur by...Ch. 3 - Hydrogen cyanide, HCN, is a poisonous gas. The...Ch. 3 -
3.114 The source of oxygen that drives he...Ch. 3 -
3.115 The therrnite reaction, Fe2O3 +Al Al2O3 +...Ch. 3 -
3.116 One of the most bizarre reactions in...
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- Cyanogen gas, C2N2, has been found in the gases of outer space. It can react with fluorine to form carbon tetrafluoride and nitrogen trifluoride. C2N2(g)+7F2(g)2CF4(g)+2NF3(g)(a) How many moles of fluorine react with 1.37 mol of cyanogen? (b) How many moles of CF4 are obtained from 13.75 mol of fluorine? (c) How many moles of cyanogen are required to produce 0.8974 mol of NF3? (d) How many moles of fluorine will yield 4.981 mol of nitrogen trifluoride?arrow_forwardThe active ingredient in aspirin is acetylsalicylic acid, which has the chemical formula C9H8O4. An aspirin pill contains 300.0 mg of acetylsalicylic acid. How many moles of acetylsalicylic acid does it contain?arrow_forwardDDT, an insecticide harmful to fish, birds, and humans, is produced by the following reaction: In a government lab, 1142 g of chlorobenzene is reacted with 485 g of chloral. a. What mass of DDT is formed, assuming 100% yield? b. Which reactant is limiting? Which is in excess? c. What mass of the excess reactant is left over? d. If the actual yield of DDT is 200.0 g, what is the percent yield?arrow_forward
- or each of the following reactions, give the balanced chemical equation for the reaction and state the meaning of the equation in terms of individual molecules and in terms of moles of molecules. msp;MnO2(s)+Al(s)Mn(s)+Al2O3(s) msp;B2O3(s)+CaF2(s)BF3(g)+CaO(s) msp;NO2(g)+H2O(l)HNO3(aq)+NO(g) msp;C6H2(g)+H2C6(g)H12(g)arrow_forwardCopper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI Are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?arrow_forwardWrite the balanced chemical equation for the complete combustion of adipic acid, an organic acid containing 49.31% C, 6.90% H, and the remainder O, by mass.arrow_forward
- Freon- 12 (CCI2F2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans. Calculate the number of molecules of Freon-12 in 5.56 mg of Freon-12. What is the mass of chlorine in 5.56 mg of Freon-12?arrow_forwardChlorine trifluoride is a colorless, reactive gas used in nuclear fuel reprocessing. How many molecules are there in a 8.55-mg sample of chlorine trifluoride?arrow_forwardFreon-12, CCl2F2, is prepared from CCl4 by reaction with HF. The other product of this reaction is HCl. Outline the steps needed to determine the percent yield of a reaction that produces 12.5 g of CCl2F2 from 32.9 g of Cd4. Freon-12 has been banned and is no longer used as a refrigerant because it catalyzes the decomposition of ozone and has a very long lifetime in the atmosphere. Determine the percent yield.arrow_forward
- Ammonia reacts with a limited amount of oxygen according to the equation 4NH3(g)+5O2(g)4NO(g)+6H2O(l)(a) How many moles of NO are obtained when 3.914 moles of oxygen are used? (b) How many moles of oxygen are required to react with 2.611 moles of ammonia? (c) How many moles of water are obtained when 0.8144 moles of ammonia are used? (d) How many moles of oxygen are required to produce 0.2179 mol of water?arrow_forwardThe gaseous hydrocarbon acetylene, C2H2, is used in welders’ torches because of the large amount of heat released when acetylene burns with oxygen. :math>2C2H2(g)+5O2(g)4CO2(g)+2H2O(g) w many grams of oxygen gas are needed for the complete combustion of 150 g of acetylene?arrow_forwardA cereal contains 11.0 grams of sucrose (C_{12}*H_{22}*O_{11}) per 60.0 grams of cerealWhat mass in grams of cereal must be eaten to consume 0.0424 moles of sucrose ?arrow_forward
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