Cem 141 Study guides, Class notes & Summaries

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 ...

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...

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...

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...

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...

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...

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 ...

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...

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 --> solid? -released to surroundings when phases change fro...

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...