Michigan State University

STT 231 EXAM 1 REVIEW (PRACTICE PROBLEMS) | QUESTIONS AND ANSWERS | 2026 UPDATED - RATED 100% CORRECT.

STT 231 EXAM 3 | QUESTIONS AND ANSWERS | 2026 UPDATE | 100% CORRECT - MSU.

STT 231 EXAM 1 | QUESTIONS AND ANSWERS | 2026 UPDATE | 100% CORRECT - MICHIGAN STATE UNIVERSITY.

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 ...

scientific question -Correct Answer -can be answered by doing experiments, making observation, taking measurements, etc. in a replicable way Lights acts as what? -Correct Answer -Particle and wave. scientific model -Correct Answer -drawing, graph, diagram, equation. represent many chemical entities. 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 scientific theory -Correct ...

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...

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?...

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) ...

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...

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...