Atomic mass unit amu - Study guides, Class notes & Summaries
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C190 WGU Biology exam 2023 with 100% correct answers
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Biological macromolecules 
formed when atoms of carbon, hydrogen, oxygen, nitrogen, phosphorus, and other elements bond with each other in unique and varied ways 
 
 
 
Atom 
building blocks of all matter 
 
 
 
four classes of biological macromolecules 
carbohydrates, lipids, proteins, and nucleic acids 
 
 
 
cell 
fundamental, basic unit of life 
 
 
 
Matter 
anything that occupies space and has mass 
 
 
 
Subatomic Particles of Atom 
protons, neutrons, and electrons 
 
 
 
Electrons 
Subat...
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TEST BANK FOR CHEMISTRY AN ATOMS FIRST APPROACH, 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21 | 2024-2025.
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TEST BANK FOR CHEMISTRY AN ATOMS FIRST APPROACH, 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21 | . Chapter 1 - Chemical Foundations 
1. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112 
contains: 
a. 49 protons, 63 neutrons, 49 electrons. 
b. 49 protons, 49 neutrons. 
c. 49 protons, 49 alpha particles. 
d. 49 protons, 63 neutrons. 
e. 49 protons, 112 neutrons. 
ANSWER: d 
POINTS: 1 
2. A hypothetical element consists of two isoto...
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CHEM 101 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) ALREADY GRADED A+ NEWEST VERSION
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CHEM 101 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) ALREADY GRADED A+ NEWEST VERSION 
 
If a compound's chemical formula was experimentally determined to be 18, the chemical formula could be: 
CH4 
NH3 
H2O 
PCl5 - Answer H2O 
Use the periodic table to get the atomic masses of each element. Then you can calculate the formula mass as such: 
H=1.008×2=2.016 
O=15.999×1=15.999 
Adding these together we get 18.015, which is approximately 18. 
 
The sum...
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Chemistry 105 Exam 2 questions with Complete Solutions
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atomic mass Correct Answer-the mass of an atom in amu 
 
average atomic mass Correct Answer-the weighted average of all of the naturally occurring isotopes of the element 
 
mole (mol) Correct Answer-a unit to count number of particles 
 
6.0221415 x 10^23 Correct Answer-the amount of a mol in scientific notation (Avogadro's number) 
 
molar mass Correct Answer-the mass of 1 mole of atoms in grams (g/mol) 
 
Avogadro's number Correct Answer-6.0221415 x 10^23 
 
molecular mass (molecular weight...
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TEST BANK FOR CHEMISTRY: AN ATOMS FIRST APPROACH 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21
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TEST BANK FOR CHEMISTRY: AN ATOMS FIRST APPROACH 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21. Chapter 1 - Chemical Foundations 
1. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112 
contains: 
a. 49 protons, 63 neutrons, 49 electrons. 
b. 49 protons, 49 neutrons. 
c. 49 protons, 49 alpha particles. 
d. 49 protons, 63 neutrons. 
e. 49 protons, 112 neutrons. 
ANSWER: d 
POINTS: 1 
2. A hypothetical element consists of two isotopes...
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TEST BANK FOR CHEMISTRY; AN ATOMS FIRST APPROACH, 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21
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TEST BANK FOR CHEMISTRY; AN ATOMS FIRST APPROACH, 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112 
contains: 
a. 49 protons, 63 neutrons, 49 electrons. 
b. 49 protons, 49 neutrons. 
c. 49 protons, 49 alpha particles. 
d. 49 protons, 63 neutrons. 
e. 49 protons, 112 neutrons. 
ANSWER: d 
POINTS: 1 
2. A hypothetical element consists of two isotopes of masses 78.95 amu and 80.95 amu w...
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MIAE 221 Actual Exam | Questions with 100% Correct Answers (A Rated)
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what makes a material conductive - ANSWER Reasoning for conductivity: delocalized 'sea' of 
electrons loosely bonding the layers together. These delocalized electrons can all move along 
together - making graphite a good electrical conductor. 
atomic number - ANSWER Z 
the number of protons in the nucleus of an atom 
atomic mass unit - ANSWER a unit of mass that describes the mass of an atom or molecule 
measured in amu
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Chem 1110 TOP Study Guide Questions and CORRECT Answers
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How many Sig Figs in 0.008202 - 4 
How many sig figs would be in the answer of 6.6 multiplied by 3.56007 - 2 
How can we calculate the number of neutrons? - Number of neutrons = mass number 
(A) - number of protons/ atomic number (Z) 
How can we calculate the atomic charge? - Atomic charge= number of protons- number 
of electrons 
Avogadro's number - 6.022 x 10^23. The number of particles in exactly one mole of a 
pure substance 
atomic mass unit (amu) - one twelfth the mass of a carbon-12 a...
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CHM 1045 - Exam #1 Questions With Answers Graded A+ Assured Success
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accuracy - how close a measurement is to a true or accepted value 
acid - proton donor 
Acid Naming Rules - 1. Add O, add "per" prefix. 
2. Subtract 1 O, ending in "ous". 
3. Subtract 2 O's, add "hypo" prefix with "ous" suffix. 
acid-base titration - a solution of a known concentration (standard) is added gradually to another 
in order to determine the concentration 
actual yield - the amount of actual product formed in a reaction 
Ag⁺ - Silver cation 
Al³⁺ - Aluminum cation 
allot...
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IRRSP Exam Study Guide
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IRRSP Exam Study Guide 
 
An atom, group of atoms, molecules or particles that have acquired or are regarded as having a 
net electric charge. - Ion 
 
Atoms having the same number or protons but a different number on neutrons in the nuclei. 
Atoms with the same atomic number (the same chemical element) but different atomic weights. - 
Isotope 
 
Any source that disrupts the electrical balance of an atom and results in the production of ions. - 
Ionization 
 
The radation dose or amount of radat...
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