CEM 141

Michigan State University

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Exam (elaborations)

CEM 141 MSU Final Exam Study Questions and Answers Graded A+ 2026
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Yes because it can be tested and answered though observations and experiments -Correct Answer -Consider the question: Is there an attractive force between a pencil and the earth? Is this a scientific question? [Yes or No] Because III. It can be tested and answered through observations and experiments IV. The answer is already known and we find it online V. There is no way to design an experiment to answer this question. Atoms are mostly empty space Atoms are in constant motion -Correct ...
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CEM 141 MSU Exam 1 Study Questions with Correct Answers Graded A+ 2026
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The statement "If I add cold milk to hot coffee the temperature will decrease," is a? -Correct Answer -Claim, always include an explanation and reasoning to the claim. Scientific Model -Correct Answer -Models are used to make testable predictions How much is a picometer? -Correct Answer -0.1 x 10^-12 meters Atomic Force Microscopy/ Scanning Tunneling Microscopy -Correct Answer -Microscopes that now allows us to view atoms. Leaves are green in the summer because? -Correct Answer...
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CEM 141 Exam 1 Review with Correct Answers Graded A+ 2026
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Constructing a Scientific Explanation -Correct Answer -1. Claim (target of explanation) 2. Evidence (data used to support) 3. Reasoning (connection between claim and evidence) Scientific Theory -Correct Answer -explains how/why; best available explanation of existing evidence; makes testable predictions; is falsifiable; may change over time with new evidence Difference Between Law and Theory -Correct Answer -Law: phenomenon; explains WHAT Theory: tells WHY How do we know atoms exist?...
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CEM 141 MSU Exam 2 Study Questions with Answers Graded A+ 2026
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Lights acts as what? -Correct Answer -Particle and wave. Wavelength -Correct Answer -The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared (blue) Short - higher energy Long - lower energy Frequency (V) -Correct Answer -The number of wavefronts per second. Highest: x-ray Velocity of Light -Correct Answer -C = 3.00 X 10^8 = wavelength X frequency Amplitude -Correct Answer -The intensity, height of peaks of waves. Highest: blue light Energy of Wave (J) ...
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CEM 141 MSU Exam 2 Study Questions and Answers Graded A+
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Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - -Correct Answer -D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. Howeve...
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CEM 141 Exam 3 Study Questions and Answers Graded A+ 2026
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change of state from solid -> liquid -> gas ________ energy -Correct Answer -requires energy needed to phase change from solid --> liquid --> gas comes from: -Correct Answer -the surroundings when phases change from solid --> liquid --> gas, interactions are _______ between molecules -Correct Answer -overcome change of state from gas --> liquid --> solid ______ energy -Correct Answer -releases what happens to the energy from a phase change from gas --> liqu...
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CEM 141 Exam 1 Review Questions and Answers 2026 Latest Update
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CEM 141 Exam 1 Review Questions and Answers 2026 Latest Update
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