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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Question
Chapter L, Problem 45GQ
Interpretation Introduction
Interpretation: The reason why gallium metal melts in hand has to be explained.
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Students have asked these similar questions
Aspirin has a higher molar mass compared to salicylic acid, however aspirin melts at a lower temperature than salicylic acid. Provide a brief explanation for this
observation.
Table 1
Compound:
Formula:
Salicylic Acid
C;H6O3
Aspirin
C9H3O4
Molar Mass:
138.12
Melting point:
Ka
158-160°C
1.08 x 10³
180.15
140-142°C
2.72 x 10$
pKa
Solubility (g/100ML)
2.99
4.57
0.18
0.25
Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.)
Substance
Melting Point (°C)
Molar Mass (g/mol)
Cl2
−102
71
Ethyl formate (CH3CH2OCHO)
−80
74
Propionic acid (CH3CH2COOH)
−20
74
Br2
−7.2
160
2. Why does the temperature of a mixture of ice and water remain constant during melting and freezing?
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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