EBK BASIC CHEMISTRY
5th Edition
ISBN: 8220101472335
Author: Timberlake
Publisher: PEARSON
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Chapter 4, Problem 4.82CQ
Silicon has three naturally occurring isotopes: Si-28 that has a percent abundance of 92. 23% and a mass of 27. 977 amu, Si.29 that has a 4.66% abundance and a mass of 28. 976 amu, and Si-30 that has a percent abundance of 3. 09% and a mass of 29. 974 amu. Calculate the
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The relative ratio, or percent, of each isotope found in nature is the abundance number used to calculate the average mass.
Here's the general equation for average atomic mass:
(Abundance A)(Mass A) +
(Abundance B)(Mass B) = Atomic Mass
For example, here's how the average mass of of boron was calculated.
Percent Boron-10
Percent Boron-11
10 +
11 =10.81 amu
100
100
(.20)10 + (.80)11 = 10.8 amu
%D
3. Let's try out the atomic mass equation.
Suppose you have a mixture of two nitrogen isotopes.
For every 1 Nitrogen-15 isotopes, there are 3 Nitrogen-14 isotopes.
Determine the abundance of each isotope in this mixture.
Predict the average atomic mass of this mixture.
Hint: This is NOT the mixture of nitrogen found in nature. You can check your answer by clicking "My Mixture" under isotope mixture.
Next, create the mixture described in the problem.
14.50 amu
14.00 amu
14.25 amu
14.75 amu
(3.7)Classify each of the following as an atomic element, molecular element, molecular compound, or ionic compound.
tin(IV) phosphide
[Choose ]
gold
[Choose]
carbon monoxide
[Choose]
V
bromine
[Choose ]
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4. (10 points) Copper consists primarily of two isotopes, Copper-63 and Copper-65.
The weighted average isotopic mass for copper is 63.55 amu. Find the percent
abundance of each of the two isotopes of copper.
Chapter 4 Solutions
EBK BASIC CHEMISTRY
Ch. 4.1 - Write the symbols for the following elements:...Ch. 4.1 - Write the symbols for the following elements:...Ch. 4.1 - Prob. 4.3QAPCh. 4.1 - Prob. 4.4QAPCh. 4.1 - Prob. 4.5QAPCh. 4.1 - Prob. 4.6QAPCh. 4.2 - Prob. 4.7QAPCh. 4.2 - Prob. 4.8QAPCh. 4.2 - Give the symbol of the element described by each...Ch. 4.2 - Prob. 4.10QAP
Ch. 4.2 - Prob. 4.11QAPCh. 4.2 - Prob. 4.12QAPCh. 4.2 - Prob. 4.13QAPCh. 4.2 - Prob. 4.14QAPCh. 4.2 - Prob. 4.15QAPCh. 4.2 - Prob. 4.16QAPCh. 4.3 - Identify each of the following as describing...Ch. 4.3 - Identify each of the following as describing...Ch. 4.3 - Prob. 4.19QAPCh. 4.3 - Prob. 4.20QAPCh. 4.3 - Prob. 4.21QAPCh. 4.3 - Prob. 4.22QAPCh. 4.3 - Prob. 4.23QAPCh. 4.3 - Prob. 4.24QAPCh. 4.4 - Prob. 4.25QAPCh. 4.4 - Prob. 4.26QAPCh. 4.4 - Prob. 4.27QAPCh. 4.4 - Prob. 4.28QAPCh. 4.4 - Prob. 4.29QAPCh. 4.4 - How many protons and electrons are there in a...Ch. 4.4 - Prob. 4.31QAPCh. 4.4 - Prob. 4.32QAPCh. 4.5 - What are the number of protons, neutrons, and...Ch. 4.5 - Prob. 4.34QAPCh. 4.5 - Prob. 4.35QAPCh. 4.5 - Prob. 4.36QAPCh. 4.5 - Prob. 4.37QAPCh. 4.5 - Strontium has four naturally occurring isotopes,...Ch. 4.5 - Prob. 4.39QAPCh. 4.5 - Prob. 4.40QAPCh. 4.5 - Prob. 4.41QAPCh. 4.5 - Prob. 4.42QAPCh. 4.5 - Prob. 4.43QAPCh. 4.5 - A fluorine sample consists of only one type of...Ch. 4.5 - Prob. 4.45QAPCh. 4.5 - Zinc consists of five naturally occurring...Ch. 4 - Prob. 4.47FUCh. 4 - How many neutrons are in K-41? Write the electron...Ch. 4 - Prob. 4.49UTCCh. 4 - Prob. 4.50UTCCh. 4 - Prob. 4.51UTCCh. 4 - Prob. 4.52UTCCh. 4 - Prob. 4.53UTCCh. 4 - Prob. 4.54UTCCh. 4 - Prob. 4.55UTCCh. 4 - Prob. 4.56UTCCh. 4 - Prob. 4.57UTCCh. 4 - Prob. 4.58UTCCh. 4 - Prob. 4.59AQAPCh. 4 - Prob. 4.60AQAPCh. 4 - Prob. 4.61AQAPCh. 4 - Prob. 4.62AQAPCh. 4 - Prob. 4.63AQAPCh. 4 - Prob. 4.64AQAPCh. 4 - Prob. 4.65AQAPCh. 4 - Prob. 4.66AQAPCh. 4 - Prob. 4.67AQAPCh. 4 - Prob. 4.68AQAPCh. 4 - Prob. 4.69AQAPCh. 4 - Prob. 4.70AQAPCh. 4 - Prob. 4.71CQCh. 4 - Prob. 4.72CQCh. 4 - Prob. 4.73CQCh. 4 - Prob. 4.74CQCh. 4 - Prob. 4.75CQCh. 4 - Prob. 4.76CQCh. 4 - Prob. 4.77CQCh. 4 - Prob. 4.78CQCh. 4 - Prob. 4.79CQCh. 4 - Prob. 4.80CQCh. 4 - Prob. 4.81CQCh. 4 - Silicon has three naturally occurring isotopes:...Ch. 4 - Prob. 4.83CQCh. 4 - Prob. 4.84CQCh. 4 - Prob. 4.85CQCh. 4 - Prob. 4.86CQCh. 4 - Prob. 4.87CQCh. 4 - Prob. 4.88CQCh. 4 - Prob. 4.89CQCh. 4 - Prob. 4.90CQ
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