Chemistry
3rd Edition
ISBN: 9780073402734
Author: Julia Burdge
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1, Problem 14QP
Classify each of the following substances as an element or a compound: (a) hydrogen, (b) water, (c) gold, (d) sugar.
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Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
This reaction is always spontaneous, but
proceeds slower at temperatures above
120. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
117. °C.
AS is
(pick one)
ΔΗ is
(pick one)
This reaction is slower below 20. °C than
C
above.
AS is
|(pick one)
?
18
Ar
1
Calculating the pH at equivalence of a titration
Try Again
Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH
=
11.43]
G
00.
18
Ar
B•
Biological Macromolecules
Naming and drawing the products of aldose oxidation and reduction
aw a Fischer projection of the molecule that would produce L-ribonic acid if it were subjected to mildly oxidizing reaction conditions.
Click and drag to start drawing a
structure.
X
AP
‡
1/5
Naor
Explanation
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Chapter 1 Solutions
Chemistry
Ch. 1.1 - Practice Problem ATTEMPT
Express the freezing...Ch. 1.1 - Practice ProblemBUILD According to the website of...Ch. 1.1 - Prob. 1PPCCh. 1.2 - Prob. 1PPACh. 1.2 - Practice ProblemBUILD In Ray Bradbury's 1953 novel...Ch. 1.2 - Practice ProblemCONCEPTUALIZE If a single degree...Ch. 1.3 - Practice ProblemAttempt Given that 25 .0 mL of...Ch. 1.3 - Practice Problem BUILD
Calculate (a) the density...Ch. 1.3 - Practice ProblemCONCEPTUALIZE Using the picture of...Ch. 1.3 - The coldest temperature ever recorded on Earth was...
Ch. 1.3 - What is the density of an object that has a volume...Ch. 1.3 - A sample of water is heated from room temperature...Ch. 1.3 - Prob. 4CPCh. 1.4 - Prob. 1PPACh. 1.4 - Prob. 1PPBCh. 1.4 - Practice Problem CONCEPTUALIZE
The diagram on the...Ch. 1.4 - Prob. 1CPCh. 1.4 - Prob. 2CPCh. 1.5 - Practice Problem ATTEMPT
Determine the number of...Ch. 1.5 - Prob. 1PPBCh. 1.5 - Prob. 1PPCCh. 1.5 - 1.5.1 What volume of water does the graduated...Ch. 1.5 - Which of the following is the sum of the following...Ch. 1.5 - The true dependence of y on x is represented by...Ch. 1.5 - What is the result of the following calculation to...Ch. 1.6 - Practice ProblemATTEMPT Perform the following...Ch. 1.6 - Practice ProblemBUILD Perform the following...Ch. 1.6 - Practice Problem CONCEPTUALIZE
A citrus dealer in...Ch. 1.6 - The density of lithium metal is 535 kg/m 3 . What...Ch. 1.6 - 1.6.2 Convert to liters.
Ch. 1.6 - 1.6.3 What is the volume of a 5.75-g object that...Ch. 1.6 - How many cubic centimeters are there in a cubic...Ch. 1.7 - Practice Problem ATTEMPT
An empty container with...Ch. 1.7 - Practice Problem BUILD
Another empty container...Ch. 1.7 - Practice ProblemCONCEPTUALIZE Several pieces of...Ch. 1.8 - Practice ProblemATTEMPT The American Heart...Ch. 1.8 - Practice ProblemBUILD An object has a mass of...Ch. 1.8 - Practice ProblemCONCEPTUALIZE The diagram contains...Ch. 1.9 - Practice ProblemATTEMPT The density of silver is...Ch. 1.9 - Practice ProblemBUILD The density of mercury is 13...Ch. 1.9 - Practice ProblemCONCEPTUALIZE Each diagram [ ( i )...Ch. 1 - 1.1
Given that the density of gold is , calculate...Ch. 1 - Prob. 2KSPCh. 1 - Determine the density of the following object in...Ch. 1 - A 28-kg child can consume a maximum of 23...Ch. 1 - Define the terms chemistry and matter.Ch. 1 - 1.2 Explain what is meant by the scientific...Ch. 1 - what is the difference between a hypothesis and a...Ch. 1 - Classify each of the following statements as a...Ch. 1 - Classify each of the following statements as a...Ch. 1 - Identify the elements present in the following...Ch. 1 - Identify the elements present in the following...Ch. 1 - Give an example for each of the following terms:...Ch. 1 - 1.9 Give an example of a homogeneous mixture and...Ch. 1 - Give an example of an element and a compound. How...Ch. 1 - What is the number of known elements?Ch. 1 - Give the names of the elements represented by the...Ch. 1 - 1.13 Give the chemical symbols for the following...Ch. 1 - Classify each of the following substances as an...Ch. 1 - Classify each of the following as an element, a...Ch. 1 - Identify each of the diagrams shown here as a...Ch. 1 - Identify each of the diagrams shown here as an...Ch. 1 - Name the SI base units that are important in...Ch. 1 - 1.19 Write the numbers represented by the...Ch. 1 - 1.20 What units do chemists normally use for the...Ch. 1 - 1.21 What is the difference between mass and...Ch. 1 - 1.22 Describe the three temperature scales used in...Ch. 1 - Bromine is a reddish-brown liquid. Calculate its...Ch. 1 - Prob. 24QPCh. 1 - Prob. 25QPCh. 1 - Prob. 26QPCh. 1 - Prob. 27QPCh. 1 - The density of platinum (Pt) is 21 .5 g/cm 3 at...Ch. 1 - Convert the following temperatures to kelvin: (a)...Ch. 1 - Convert the following temperatures to degrees...Ch. 1 - What is the difference between qualitative data...Ch. 1 - Using examples, explain the difference between a...Ch. 1 - How does an intensive property differ from an...Ch. 1 - Determine which of the following properties are...Ch. 1 - Classify the following as qualitative or...Ch. 1 - 1.38 Determine whether the following statements...Ch. 1 - Determine whether each of the following describes...Ch. 1 - 1.40 A student pours 44.3 g of water at into a...Ch. 1 - Prob. 39QPCh. 1 - Comment on whether each of the following...Ch. 1 - What is the advantage of using scientific notation...Ch. 1 - Define significant figure. Discuss the importance...Ch. 1 - Distinguish between the terms accuracy and...Ch. 1 - 1.46 Express the following numbers in scientific...Ch. 1 - Express the following as decimals: (a) 1.52 × 10 −...Ch. 1 - Express the answers to the following calculations...Ch. 1 - 1.49 Express the answers to the following...Ch. 1 - 1.50 Determine the number of significant figures...Ch. 1 - Determine the number of significant figures in...Ch. 1 - Prob. 50QPCh. 1 - Carry out the following operations as if they were...Ch. 1 - Three students ( A, B, and C ) are asked to...Ch. 1 - Three apprentice tailors ( X, Y, and Z ) are...Ch. 1 - Carry out the following conversions: (a) 22.6 m to...Ch. 1 - Carry out the following conversions: (a) 242 lb to...Ch. 1 - The average speed of helium at 25°C is 1255 m/s ....Ch. 1 - Prob. 57QPCh. 1 - Prob. 58QPCh. 1 - Prob. 59QPCh. 1 - 1.62 A 6.0-ft person weighs 168 lb. Express this...Ch. 1 - Prob. 61QPCh. 1 - For a fighter jet to take off from the deck of an...Ch. 1 - Prob. 63QPCh. 1 - Prob. 64QPCh. 1 - Carry out the following conversions: (a) 185 nm to...Ch. 1 - 1.68 Aluminum is a lightweight metal used in...Ch. 1 - Prob. 67QPCh. 1 - (a) Carbon monoxide ( CO ) is a poisonous gas...Ch. 1 - Prob. 69QPCh. 1 - A human brain weighs about 1 kg and contains about...Ch. 1 - Using the appropriate number of significant...Ch. 1 - 1.74 A piece of metal with a mass of 13.2 g was...Ch. 1 - 1.75 Which of the following statements describe...Ch. 1 - 1.76 In determining the density of a rectangular...Ch. 1 - Calculate the mass of each of the following: (a) a...Ch. 1 - 1.78 A cylindrical glass tube 12.7 cm in length is...Ch. 1 - The following procedure was used to determine the...Ch. 1 - 1.80 The speed of sound in air at room temperature...Ch. 1 - A piece of silver ( Ag ) metal weighing 194.3 g is...Ch. 1 - The experiment described in Problem 1.81 is a...Ch. 1 - A lead sphere has a mass of 1 .20 × 10 4 g . and...Ch. 1 - Lithium is the least dense metal known ( density =...Ch. 1 - At what temperature does the numerical reading on...Ch. 1 - Prob. 84APCh. 1 - Prob. 85APCh. 1 - A sheet of aluminum ( A1 ) foil hat a total area...Ch. 1 - Prob. 87APCh. 1 - 1.90 The surface area and average depth of the...Ch. 1 - The unit "troy ounce" is often used for precious...Ch. 1 - Prob. 90APCh. 1 - Calculate the percent error for the following...Ch. 1 - In water conservation, chemists spread a thin film...Ch. 1 - 1.95 You are given a liquid. Briefly describe the...Ch. 1 - A gas company in Massachusetts charges $1 .30 for...Ch. 1 - Prob. 95APCh. 1 - 1.98 A bank teller is asked to assemble sets of...Ch. 1 - Prob. 97APCh. 1 - 1.100 Venus, the second closest planet to the sun....Ch. 1 - Comment on whether each of the following is a...Ch. 1 - It has been estimated that 8.0 × 10 4 tons of gold...Ch. 1 - Prob. 101APCh. 1 - 1.104 Measurements show that 1.0 g of iron ...Ch. 1 - 1.105 The thin outer layer of Earth, called the...Ch. 1 - 1.106 The radius of a copper atom is roughly ....Ch. 1 - A graduated cylinder is filled to the 40.00-mL...Ch. 1 - A chemist mixes two liquids A and B to form a...Ch. 1 - A chemist in the nineteenth century prepared an...Ch. 1 - Chlorine is used to disinfect swimming pools. The...Ch. 1 - Prob. 109APCh. 1 - Prob. 110APCh. 1 - Chalcopyrite, the principal one of copper ( Cu ) ,...Ch. 1 - 1.114 Vanillin (used to flavor vanilla ice cream...Ch. 1 - One gallon of gasoline in an automobile’s engine...Ch. 1 - 1.116 Magnesium (Mg) is a valuable metal used in...Ch. 1 - Prob. 115APCh. 1 - The natural abundances of elements in the human...Ch. 1 - A resting adult requires about 240 mL of pure...Ch. 1 - 1.120 (a) Referring to Problem 1.119. calculate...Ch. 1 - The medicinal thermometer commonly used in homes...Ch. 1 - TUMS is a popular remedy for acid indigestion. A...Ch. 1 - Prob. 121APCh. 1 - English writer and essayist Lady Mary Wortley...Ch. 1 - English writer and essayist Lady Mary Wortley...Ch. 1 - English writer and essayist Lady Mary Wortley...Ch. 1 - English writer and essayist Lady Mary Wortley...
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