Chemistry & Chemical Reactivity
9th Edition
ISBN: 9781133949640
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter L.2, Problem 2RC
Two students were assigned to determine the mass of a sample of an unknown liquid. Student A used an ordinary laboratory balance that could determine mass to ±0.01 g. Student B used an analytical balance that could measure mass to ±0.1 mg. Each made four measurements, giving the following results:
Student A: 8.19 g, 8.22 g, 8.21 g, 8.25 g
Student B: 8.2210 g, 8.2210 g, 8.2209 g, 8.2210 g
2. Which student is more precise?
- (a) A
- (b) B
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Chapter L Solutions
Chemistry & Chemical Reactivity
Ch. L.1 - The distance between two carbon atoms in diamond...Ch. L.1 - Prob. 1RCCh. L.1 - Prob. 2RCCh. L.1 - Prob. 3RCCh. L.1 - Prob. 4RCCh. L.1 - 5. A circulated U.S. quarter has a mass of 5.59 g....Ch. L.1 - Prob. 6RCCh. L.1 - Prob. 7RCCh. L.2 - Two students measured the freezing point of a...Ch. L.2 - Prob. 1RC
Ch. L.2 - Two students were assigned to determine the mass...Ch. L.3 - Prob. 1CYUCh. L.3 - Prob. 1RCCh. L.3 - Prob. 2RCCh. L.3 - 3. What is the sum of 10.26 g and 0.063 g?
10.323...Ch. L.3 - Prob. 4RCCh. L.4 - The density of gold is 19,320 kg/m3. What is this...Ch. L.4 - 1. A lake has an area of 2.33 × 107 m2. What is...Ch. L.5 - What is the fuel density in units of kg/L?Ch. L.5 - What mass and what volume of fuel should have been...Ch. L.6 - A particular paint has a density of 0.914 g/cm3....Ch. L.6 - Prob. 1RCCh. L - Many laboratories use 25C as a standard...Ch. L - The temperature on the surface of the Sun is 5.5 ...Ch. L - Prob. 3PSCh. L - Make the following temperature conversions:Ch. L - A marathon distance race covers distance of 42.195...Ch. L - The average lead pencil, new and unused, is 19 cm...Ch. L - A standard U.S. postage stamp is 2.5 cm long and...Ch. L - A compact disc has a diameter of 11.8 cm. What is...Ch. L - A typical laboratory beaker has a volume of 250....Ch. L - Some soft drinks are sold in bottles with a volume...Ch. L - A book has a mass of 2.52 kg. What is this mass in...Ch. L - A new U.S. dime has a mass of 2.265 g. What is its...Ch. L - Ethylene glycol, C2H6O2, is an ingredient of...Ch. L - A piece of silver metal has a mass of 2.365 g. If...Ch. L - Prob. 15PSCh. L - Which occupies a larger volume, 600 g of water...Ch. L - You are on a diet that calls for eating no more...Ch. L - A 2-in. piece of chocolate cake with frosting...Ch. L - Prob. 19PSCh. L - Prob. 20PSCh. L - You and your lab partner are asked to determine...Ch. L - The accepted value of the melting point of...Ch. L - Prob. 23PSCh. L - Prob. 24PSCh. L - Prob. 25PSCh. L - Prob. 26PSCh. L - To determine the average mass of a popcorn kernel,...Ch. L - Use the following graph to answer the following...Ch. L - Use the graph below to answer the following...Ch. L - Solve the following equation for the unknown...Ch. L - Solve the following equation for the unknown...Ch. L - Solve the following equation for the unknown...Ch. L - Prob. 34PSCh. L - Molecular distances are usually given in...Ch. L - The separation between carbon atoms in diamond is...Ch. L - A red blood cell has a diameter of 7.5 m...Ch. L - The platinum-containing cancer drug cisplatin...Ch. L - Prob. 39GQCh. L - You need a cube of aluminum with a mass of 7.6 g....Ch. L - You have a 250.0-mL graduated cylinder containing...Ch. L - Prob. 42GQCh. L - The smallest repeating unit of a crystal of common...Ch. L - Diamond has a density of 3.513 g/cm3. The mass of...Ch. L - Prob. 45GQCh. L - The density of pure water at various temperatures...Ch. L - Prob. 47GQCh. L - The aluminum in a package containing 75 ft2 of...Ch. L - Fluoridation of city water supplies has been...Ch. L - About two centuries ago, Benjamin Franklin showed...Ch. L - Prob. 51GQCh. L - A 26-meter-tall statue of Buddha in Tibet is...Ch. L - At 25 C, the density of water is 0.997 g/cm3,...Ch. L - Suppose your bedroom is 18 ft long and 15 ft wide,...Ch. L - A spherical steel ball has a mass of 3.475 g and a...Ch. L - You are asked to identify an unknown liquid that...Ch. L - You have an irregularly shaped piece of an unknown...Ch. L - There are five hydrocarbon compounds (compounds of...Ch. L - Suppose you have a cylindrical glass tube with a...Ch. L - Copper: Copper has a density of 8.96 g/cm3 An...Ch. L - Copper: (a) Suppose you have a cube of copper...Ch. L - A sample of unknown metal is placed in a graduated...Ch. L - Iron pyrite is often called fool's gold because it...Ch. L - You can analyze for a copper compound in water...Ch. L - Prob. 67IL
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