Cem 141 Study guides, Class notes & Summaries
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CEM 141 Exam 3 Questions and Answers Already Passed
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CEM 141 Exam 3 Questions and 
Answers Already Passed 
 
change of state from solid -> liquid -> gas ________ energy requires 
 
energy needed to phase change from solid --> liquid --> gas comes from: the surroundings 
 
when phases change from solid --> liquid --> gas, interactions are _______ between molecules 
overcome 
 
change of state from gas --> liquid --> solid ______ energy releases 
 
what happens to the energy from a phase change from gas --> liquid --> s...
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CEM 141 Final Exam Questions and Answers Already Passed
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CEM 141 Final Exam Questions and 
 
Answers Already Passed 
 
If one carbon wants 4 bonds, how many bonding orbitals can it have? 
A. 1 
B. 2 
 
C. 3 
 
D. 4 D 
 
In graphite how many carbons is each carbon attached to? 
A. 2 
B. 3 
 
C. 4 
 
D. 5 B 
 
How many orbitals should "mix" to form 3 bonds? 
A. 2 
B. 3 
 
C. 4 
 
D. 5 B 
 
How many different compounds can you draw from C5H12? 
A. 2 
B. 3 
 
C. 4 
D. 5 
 
E. 6 B 
 
What is the formal charge on H for NH4+? 
A. +1 
B. -1 
C. +2 
 
D. -2 ...
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MSU CEM 141 FINAL EXAM WITH COMPLETE SOLUTIONS
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MSU CEM 141 FINAL EXAM WITH 
 
COMPLETE SOLUTIONS 
 
scientific question can be answered by doing experiments, making observation, taking 
measurements, etc. in a replicable way 
 
Lights acts as what? Particle and wave. 
 
scientific model drawing, graph, diagram, equation. represent many chemical entities. 
 
Wavelength The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared 
(blue) 
Short - higher energy 
Long - lower energy 
 
scientific theory A well tested concept t...
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MSU CEM 141 FINAL STUDY GUIDE WITH VERIFIED SOLUTIONS
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MSU CEM 141 FINAL STUDY GUIDE 
WITH VERIFIED SOLUTIONS 
 
Scientific Questions can be answered by... -Doing experiments 
-Making observations 
-Taking measurements 
 
Atomic number= Number of protons 
 
Dalton's Atomic Theory 1) Elements are composed of atoms. 
2) Atoms of same element are identical, and have the same mass and properties. 
3) Atoms of a given element are different from atoms of other elements. 
4) Compounds are formed by combinations of atoms of two or more elements. 
5) Chemic...
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CEM 141 Exam 3 Questions & Answers Solved 100% Correct!!
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change of state from solid -> liquid -> gas ________ energy - Answer-requires 
energy needed to phase change from solid --> liquid --> gas comes from: - Answer-the surroundings 
when phases change from solid --> liquid --> gas, interactions are _______ between molecules - Answerovercome 
change of state from gas --> liquid --> solid ______ energy - Answer-releases 
what happens to the energy from a phase change from gas --> liquid --> solid? - Answer-released to 
su...
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CEM 141 PRACTICE EXAM QUESTIONS WITH VERIFIED ANSWERS
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CEM 141 PRACTICE EXAM QUESTIONS 
 
WITH VERIFIED ANSWERS 
 
Which has a larger atomic radius? Mg or Ar? Why? 
A. Mg, because it is a metal. 
B. Mg, because its valence electrons are not as strongly attracted towards the nucleus as those in 
Ar. 
C. Ar, because it is a heavier element. 
D. Ar, because it has more electrons and they repel each other. B 
 
Out of Na+, Mg2+, Ne, and F- which has the smallest radius? 
A. Na+ 
 
B. Mg2+ 
C. Ne 
 
D. F- B 
 
When and where were the carbon and oxygen at...
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CEM 141-Exam 1 Latest Update Already Graded A
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CEM 141-Exam 1 Latest Update Already 
 
Graded A 
 
Matter is made up of Atoms 
 
The the smallest distinguishable part of an element Atom 
 
Can change overtime according to the evidence available Theories 
 
ALL atoms/molecules attract to one another due to Electrostatic forces 
 
________ lower potential energy of a system Attractions 
 
_____ raise potential energy of a system Repulsions 
 
Stable systems form where The attractive and repulsive forces are EQUAL or the potential 
energy is at...
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CEM 141 - Exam 2 Latest Version Already Passed
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CEM 141 - Exam 2 Latest Version 
 
Already Passed 
 
mole 6.022 x 10^23 things 
number of particles that allows us to convert from the molecular to the macroscopic level 
 
limiting reactant/reagent amount of one of the reactants which limits how much product can 
be formed. smallest amount. 
 
percent yield actual/theoretical x 100 
 
electromagnetic radiation 
 
wavelength The distance between two corresponding parts of a wave. seconds/wave. 
1/frequency. measured in m 
 
amplitude Height of ...
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CEM 141 MSU Exam 2 Questions and Answers Already Passed
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CEM 141 MSU Exam 2 Questions and 
 
Answers Already Passed 
 
Lights acts as what? Particle and wave. 
 
Wavelength The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared 
(blue) 
Short - higher energy 
Long - lower energy 
 
Frequency (V) The number of wavefronts per second. Highest: x-ray 
 
Velocity of Light C = 3.00 X 10^8 
= wavelength X frequency 
 
Amplitude The intensity, height of peaks of waves. Highest: blue light 
 
Energy of Wave (J) Increases as frequency i...
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CEM 141 UPDATED Exam Questions and CORRECT Answers
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CEM 141 UPDATED Exam Questions and 
CORRECT Answers 
Is there such a thing as a "scientific method?" - Ans no 
What do scientists do? - Ans 1. ask questions 
2. design experiments 
3. gather/analyze data and evidence 
4. make claims (based on the data/evidence) 
5. develop models, explanations, and theories about how/why the universe behaves as it does
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