Chemistry: Atoms First
3rd Edition
ISBN: 9781259638138
Author: Julia Burdge, Jason Overby Professor
Publisher: McGraw-Hill Education
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Chapter 1, Problem 1.21QP
Indicate which of the following numbers is an exact number: (a) 50,247 tickets were sold at a sporting event; (b) 750 mL of water w as used to make a birthday cake; (c) 10 eggs were used to make a breakfast; (d) 0.41 g of oxygen w as inhaled in each breath; (e) Earth orbits the sun every 365.24 days.
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111
States of Matter
Understanding conceptual components of the enthalpy of solution
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A small amount of acetonitrile (CH, CN) is dissolved in a large amount of water. Imagine separating this process into the four stages sketched below. (These
sketches show only a portion of the substances, so you can see the density and distribution of atoms and molecules in them.)
CH,CN
H₂O
B
88
C
Use these sketches to answer the questions in the table below.
The enthalpy of solution AH is negative
soln
when CH3CN dissolves in water. Use this
information to list the stages in order of increasing
enthalpy.
Would heat be absorbed or released if the system
moved from Stage C to D?
What force would oppose or favor the system
moving from Stage C to D? Check all that apply.
1
absorbed
O released
neither absorbed nor released.
none
O ionic bonding force
covalent bonding force…
In a system with an anodic overpotential, the variation of ŋ as a function of
the current density:
1. at low fields is linear 2. at higher fields, it follows Tafel's law
Find the range of current densities for which the overpotential has the same
value as when calculated for cases 1 and 2 (maximum relative difference of
5% with respect to the behavior for higher fields). To which overpotential
range does this correspond?
Data: 10 = 1.5 mA cm², T = 300°C, ẞ = 0.64, R = 8.314 J K 1 mol¹ and F = 96485
C mol-1.
Indicate 10.6 with only one significant figure.
Chapter 1 Solutions
Chemistry: Atoms First
Ch. 1.2 - illustrates conversions between these two...Ch. 1.2 - Prob. 1PPACh. 1.2 - According to the website of the National...Ch. 1.2 - If a single degree on the Celsius scale is...Ch. 1.2 - A body temperature above 39C constitutes a high...Ch. 1.2 - The average temperature at the summit of Mt....Ch. 1.2 - Prob. 2PPBCh. 1.2 - If a single degree on the Fahrenheit scale is...Ch. 1.2 - Prob. 1.3WECh. 1.2 - Given that 20.0 mL of mercury has a mass of 272 g....
Ch. 1.2 - Prob. 3PPBCh. 1.2 - Using the picture of the graduated cylinder and...Ch. 1.3 - Determine the number of significant figures in the...Ch. 1.3 - Determine the number of significant figures in the...Ch. 1.3 - Using scientific notation, express the number one...Ch. 1.3 - Perform the following arithmetic operations and...Ch. 1.3 - Perform the following arithmetic operations, and...Ch. 1.3 - Prob. 5PPBCh. 1.3 - Prob. 1.6WECh. 1.3 - Prob. 6PPACh. 1.3 - Prob. 6PPBCh. 1.3 - Several pieces of aluminum metal with a total mass...Ch. 1.4 - The Food and Drug Administration (FDA) recommends...Ch. 1.4 - The American Heart Association recommends that...Ch. 1.4 - A gold nugget has a mass of 0.9347 oz. What is its...Ch. 1.4 - The diagram contains several objects that are...Ch. 1.4 - Prob. 1.8WECh. 1.4 - Prob. 8PPACh. 1.4 - The density of mercury is 13.6 g/cm3. What is its...Ch. 1.4 - Each diagram [(i) or (ii)] shows the objects...Ch. 1 - Prob. 1.1QPCh. 1 - Explain what is meant by the scientific method.Ch. 1 - What is the difference between a hypothesis and a...Ch. 1 - Classily each of the following statements as a...Ch. 1 - Classify each of the following statements as a...Ch. 1 - Name the SI base units that are important in...Ch. 1 - Write the numbers represented by the following...Ch. 1 - What units do chemists normally use for the...Ch. 1 - What is the difference between mass and weight? If...Ch. 1 - Prob. 1.10QPCh. 1 - Prob. 1.11QPCh. 1 - Prob. 1.12QPCh. 1 - Prob. 1.13QPCh. 1 - Prob. 1.14QPCh. 1 - The density of water at 40C is 0.992 g/mL. What is...Ch. 1 - Prob. 1.16QPCh. 1 - Prob. 1.17QPCh. 1 - Prob. 1.18QPCh. 1 - Prob. 1.19QPCh. 1 - Prob. 1.20QPCh. 1 - Indicate which of the following numbers is an...Ch. 1 - Prob. 1.22QPCh. 1 - Distinguish between the terms accuracy and...Ch. 1 - Express the following numbers in scientific...Ch. 1 - Prob. 1.25QPCh. 1 - Prob. 1.26QPCh. 1 - Express the answers to the following calculations...Ch. 1 - Determine the number of significant figures in...Ch. 1 - Prob. 1.29QPCh. 1 - Carry out the following operations as if they were...Ch. 1 - Prob. 1.31QPCh. 1 - Three students (A, B, and C) are asked to...Ch. 1 - Prob. 1.33QPCh. 1 - Prob. 1.34QPCh. 1 - Prob. 1.35QPCh. 1 - The density of the metal bar shown is 8.16 g/cm3....Ch. 1 - The following shows an experiment used to...Ch. 1 - Prob. 1.38QPCh. 1 - Prob. 1.39QPCh. 1 - Prob. 1.40QPCh. 1 - Carry out the following conversions: (a) 1.1 1022...Ch. 1 - The average speed of helium at 25C is 1255 m/s....Ch. 1 - Prob. 1.43QPCh. 1 - Prob. 1.44QPCh. 1 - Prob. 1.45QPCh. 1 - Prob. 1.46QPCh. 1 - Prob. 1.47QPCh. 1 - Prob. 1.48QPCh. 1 - Prob. 1.49QPCh. 1 - Prob. 1.50QPCh. 1 - Prob. 1.51QPCh. 1 - Prob. 1.52QPCh. 1 - The density of ammonia gas under certain...Ch. 1 - Prob. 1.54QPCh. 1 - Prob. 1.55QPCh. 1 - Prob. 1.56QPCh. 1 - Prob. 1.57QPCh. 1 - Classify each of the following as a pure...Ch. 1 - What is the difference between a qualitative...Ch. 1 - Prob. 1.60QPCh. 1 - Prob. 1.61QPCh. 1 - Determine which of the following properties are...Ch. 1 - Prob. 1.63QPCh. 1 - Determine whether the following statements...Ch. 1 - Determine whether each of the following describes...Ch. 1 - Determine whether each of the following describes...Ch. 1 - ADDITIONAL PROBLEMS 1.67 Using the appropriate...Ch. 1 - Prob. 1.68QPCh. 1 - Winch of the following statements describe...Ch. 1 - Prob. 1.70QPCh. 1 - Prob. 1.71QPCh. 1 - In determining the density of a rectangular metal...Ch. 1 - Prob. 1.73QPCh. 1 - Prob. 1.74QPCh. 1 - Prob. 1.75QPCh. 1 - Prob. 1.76QPCh. 1 - A piece of platinum metal weighing 234.0 g is...Ch. 1 - The experiment described in Problem 1.77 is a...Ch. 1 - A copper sphere has a mass of 2.17 103 g. and its...Ch. 1 - Lithium has a very low density (density = 0.53...Ch. 1 - Prob. 1.81QPCh. 1 - Vanillin (used to flavor vanilla ice cream and...Ch. 1 - Prob. 1.83QPCh. 1 - Prob. 1.84QPCh. 1 - Prob. 1.85QPCh. 1 - Prob. 1.86QPCh. 1 - Prob. 1.87QPCh. 1 - Magnesium is used in alloys, in batteries, and in...Ch. 1 - Prob. 1.89QPCh. 1 - The surface area and average depth of the Pacific...Ch. 1 - Calculate the percent error for the following...Ch. 1 - Prob. 1.92QPCh. 1 - Chalcopyrite contains 34.63 percent copper by...Ch. 1 - Prob. 1.94QPCh. 1 - One gallon of gasoline in an automobile's engine...Ch. 1 - Prob. 1.96QPCh. 1 - The worlds total petroleum reserve is estimated at...Ch. 1 - Prob. 1.98QPCh. 1 - Prob. 1.99QPCh. 1 - Chlorine is used to disinfect swimming pools. The...Ch. 1 - Prob. 1.101QPCh. 1 - Prob. 1.102QPCh. 1 - Prob. 1.103QPCh. 1 - Prob. 1.104QPCh. 1 - Prob. 1.105QPCh. 1 - Prob. 1.106QPCh. 1 - Prob. 1.107QPCh. 1 - Prob. 1.108QPCh. 1 - Prob. 1.109QPCh. 1 - Prob. 1.110QPCh. 1 - In January 2009, the National Aeronautics and...Ch. 1 - Prob. 1.112QPCh. 1 - Prob. 1.113QPCh. 1 - Prob. 1.114QPCh. 1 - Prob. 1.115QPCh. 1 - The composition of pennies has changed over the...
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